00 is both a numberand the numerical digit used to represent that number in numerals.It fulfills a central role in mathematics as the additive identity of the integers, real numbers, and many other algebraic structures. As a digit, 0 is used as a placeholder in place value systems...

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10 10 is an even natural number following 9 and preceding 11.In mathematics:Ten is a composite number, its proper divisors being , and...

11 11 is the natural number following 10 and preceding 12.Eleven is the first number which cannot be counted with a human's eight fingers and two thumbs additively. In English, it is the smallest positive integer requiring three syllables and the largest prime number with a singlemorpheme name...

12 12 is the natural number following 11 and preceding 13.The word "twelve" is the largest number with a singlemorpheme name in English. Etymology suggests that "twelve" arises from the Germanic compound twalif "twoleftover", so a literal translation would yield "two remaining [after having ten...

1313 is the natural number after 12 and before 14. It is the smallest number with eight letters in its name spelled out in English. It is also the first of the teens – the numbers 13 through 19 – the ages of teenagers....

14 14 is the natural number following 13 and preceding 15.In speech, the numbers 14 and 40 are often confused. When carefully enunciated, they differ in which syllable is stressed: 14 vs 40...

15 15 is the natural number following 14 and preceding 16. In English, it is the smallest natural number with seven letters in its spelled name....

1616 is the natural number following 15 and preceding 17. 16 is a composite number, and a square number, being 42 = 4 × 4. It is the smallest number with exactly five divisors, its proper divisors being , , and ....

17 17 is the natural number following 16 and preceding 18. It is prime.In spoken English, the numbers 17 and 70 are sometimes confused because they sound similar. When carefully enunciated, they differ in which syllable is stressed: 17 vs 70...

18 18 is the natural number following 17 and preceding 19.In speech, the numbers 18 and 80 are sometimes confused. When carefully enunciated, they differ in which syllable is stressed: 18 vs 80 . However, in dates such as 1864, or when contrasting numbers in the teens, such as 17, 18, 19, the stress...

19 19 is the natural number following 18 and preceding 20. It is a prime number.In English speech, the numbers 19 and 90 are often confused. When carefully enunciated, they differ in which syllable is stressed: 19 vs 90...

20 20 is the natural number following 19 and preceding 21. A group of twenty units may also be referred to as a score.In mathematics:*20 is the basis for vigesimal number systems....

21 21 is the natural number following 20 and preceding 22.In mathematics:Twentyone is the fifth discrete Semiprime and the second in the family. With 22 it forms the second discrete Semiprime pair...

22 22 is the natural number following 21 and preceding 23. In mathematics :Twentytwo is an even composite number, its proper divisors being 1, 2 and 11....

2323 is the natural number following 22 and preceding 24. In mathematics :Twentythree is the ninth prime number, the smallest odd prime that is not a twin prime. Twentythree is also the fifth factorial prime, the third Woodall prime...

2424 is the natural number following 23 and preceding 25.The SI prefix for 1024 is yotta , and for 10−24 yocto...

2525 is the natural number following 24 and preceding 26.In mathematics:It is a square number, being 5² = 5 × 5. It is the smallest square that is also a sum of two squares: 25 = 3² + 4²...

26 26 is the natural number following 25 and preceding 27. In mathematics :26 is the only positive integer that is one greater than a square and one less than a cube .A rhombicuboctahedron has twentysix sides....

27 27 is the natural number following 26 and preceding 28. In mathematics :Twentyseven is a perfect cube, being 33 = 3 × 3 × 3. 27 is also 23 . There are exactly 27 straight lines on a smooth cubic surface, which give a basis of the fundamental representation of the E6 Lie algebra...

28 28 is the natural number following 27 and preceding 29.In mathematics:It is a composite number, its proper divisors being 1, 2, 4, 7, and 14....

29 29 is the natural number following 28 and preceding 30.In mathematics:It is the tenth prime number, and also the fourth primorial prime. It forms a twin prime pair with thirtyone, which is also a primorial prime. Twentynine is also the sixth Sophie Germain prime. It is also the sum of three...

30 30 is the natural number following 29 and preceding 31.In mathematics:30 is the sum of the first four squares, which makes it a square pyramidal number.It is a primorial and is the smallest Giuga number....

31 31 is the natural number following 30 and preceding 32. In mathematics :Thirtyone is the third Mersenne prime as well as the fourth primorial prime, and together with twentynine, another primorial prime, it comprises a twin prime. As a Mersenne prime, 31 is related to the perfect number 496,...

32 32 is the natural number following 31 and preceding 33.In mathematics:32 is the smallest number n with exactly 7 solutions to the equation φ = n...

33 33 is the natural number following 32 and preceding 34.In mathematics:33 is the largest positive integer that cannot be expressed as a sum of different triangular numbers. It is also the smallest odd repdigit that is not a prime number.33 is the eighth distinct semiprime comprising the prime...

34 34 is the natural number following 33 and preceding 35.In mathematics:34 is the ninth distinct semiprime and has four divisors including unity and itself. Its neighbors, 33 and 35, also are distinct semiprimes, having four divisors each, and 34 is the smallest number to be surrounded by numbers...

35 35 is the natural number following 34 and preceding 36. In mathematics :35 is the sum of the first five triangular numbers, making it a tetrahedral number....

36 36 is the natural number following 35 and preceding 37. In mathematics :36 is both the square of 6 and a triangular number, making it a square triangular number...

3737 is the natural number following 36 and preceding 38.In mathematics:It is a prime number, the fifth lucky prime, the first irregular prime, the third unique prime and the third cuban prime of the form...

38This article discusses the number thirtyeight. For the year 38 CE, see 38. For other uses of 38, see 38 38 is the natural number following 37 and preceding 39.In mathematics:...

39 39 is the natural number following 38 and preceding 40. In mathematics :Thirtynine is the sum of five consecutive primes and the sum of the first three powers of 3...

40 40 is the natural number following 39 and preceding 41.Despite being related to the word "four" , 40 is spelled "forty", and not "fourty"...

41 41 is the natural number following 40 and preceding 42.In mathematics:Fortyone is the 13th smallest prime number. The next is fortythree, with which it comprises a twin prime...

4242 is the natural number immediately following 41 and directly preceding 43. The number has received considerable attention in popular culture as a result of its central appearance in The Hitchhiker's Guide to the Galaxy as the "Answer to the Ultimate Question of Life, the Universe, and...

43 43 is the natural number following 42 and preceding 44. In mathematics :Fortythree is the 14th smallest prime number. The previous is fortyone, with which it comprises a twin prime, and the next is fortyseven. 43 is the smallest prime that is not a Chen prime...

44 44 is the natural number following 43 and preceding 45. In mathematics :Fortyfour is a tribonacci number, a happy number, an octahedral number and a palindromic number....

4545 is the natural number following 44 and followed by 46. In mathematics :Fortyfive is a triangular number, a hexagonal and 16gonal number, a Kaprekar number, and a Harshad number....

46 46 is the natural number following 45 and preceding 47. In mathematics :Fortysix is a WedderburnEtherington number, an enneagonal number and a centered triangular number. It is the sum of the totient function for the first twelve integers. 46 is the largest even integer that can't be expressed...

47 47 is the natural number following 46 and preceding 48.In mathematics:Fortyseven is the fifteenth prime number, a safe prime, the thirteenth supersingular prime, and the sixth Lucas prime. Fortyseven is a highly cototient number...

48 48 is the natural number following 47 and preceding 49. It is one third of a gross or four dozens. In mathematics :Fortyeight is a double factorial of 6, a highly composite number. Like all other multiples of 6, it is a semiperfect number. 48 is the second 17gonal number.48 is in abundance...

49 49 is the natural number following 48 and preceding 50.In mathematics:* Fortynine is the square of seven and is therefore the fourth squared prime number.The aliquot sum of fortynine is 8...

50 This article discusses the number fifty. For the year 50 CE, see 50. For other uses of 50, see 50 50 is the natural number following 49 and preceding 51.In mathematics:...

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5252 is the natural number following 51 and preceding 53.In mathematics:Fiftytwo is the 6th Bell number and a decagonal number...

53 53 is the natural number following 52 and preceding 54.In mathematics:Fiftythree is the 16th prime number. It is also an Eisenstein prime....

54 54 is the natural number following 53 and preceding 55.In mathematics:54 is a 19gonal number. Twice the third power of three, 54 is a Leyland number. 54 can be written as the sum of three squares in three different ways: 7^2 + 2^2 + 1^2 = 6^2 + 2 = 2 + 2^2 = 54. It is the smallest number with...

55 55 is the natural number following 54 and preceding 56.Albania:*Gazeta 55, a newspaper*Constitution law 55, a law during Communist Albania.Mathematics:...

56 56 is the natural number following 55 and preceding 57. Mathematics :56 is the sum of the first six triangular numbers , as well as the sum of six consecutive primes . It is also a tetranacci number and a pronic number. Adding up the divisors of 1 through 8 gives 56...

57 57 is the natural number following 56 and preceding 58. In mathematics :Fiftyseven is the sixteenth discrete semiprime and the sixth in the family. With 58 it forms the fourth discrete biprime pair. 57 has an aliquot sum of 23 and is the first composite member of the 23aliquot tree...

58 58 is the natural number following 57 and preceding 59.In mathematics:Fiftyeight has an aliquot sum of 32 and is the second composite member of the 83aliquot tree....

59 59 is the natural number following 58 and preceding 60.In mathematics:Fiftynine is the 17th smallest prime number. The next is sixtyone, with which it comprises a twin prime. 59 is an irregular prime, a safe prime and the 14th supersingular prime. It is an Eisenstein prime with no imaginary...

60 60 is the natural number following 59 and preceding 61. Being three times twenty, 60 is called "three score" in some older literature.In mathematics:...

61 61 is the natural number following 60 and preceding 62.In mathematics:It is the 18th prime number. The previous is 59, with which it comprises a twin prime. Sixtyone is a cuban prime of the form p = / , x = y + 1....

62 62 is a natural number following 61 and preceding 63. It is a composite number with the divisors 2 and 31 being the eighteenth discreet semiprime. 62 has an aliquot sum of 34; itself a discrete semiprime, and the 10 member aliquot sequence . 62 is therefore the tenth member of the 7aliquot tree...

63 63 is a natural number following 62 and preceding 64.In mathematics:Although a number of the form 2n  1, 63 is not a Mersenne prime since n is not prime and 63 is certainly not prime either. It is a Woodall number and a Harshad number. It is a highly cototient number. It is a repdigit in base 4...

64 64 is the natural number following 63 and preceding 65.In mathematics:Sixtyfour is the square of 8, the cube of 4, and the sixth power of 2. It is the smallest number with exactly seven divisors. It is the lowest positive power of two that is adjacent to neither a Mersenne prime nor a Fermat...

65 65 is the natural number following 64 and preceding 66.In mathematics:Sixtyfive is the 23rd semiprime and the 3rd of the form it is an octagonal number. It is also a Cullen number...

6666 is the natural number following 65 and preceding 67.Usages of this number include:Mathematics:*66 is a sphenic number, a triangular number, a hexagonal number, and a semimeandric number...

67 67 is the natural number following 66 and preceding 68. It is an odd number.In mathematics:Sixtyseven is the 19th prime number , an irregular prime, a lucky prime, the sum of five consecutive primes , and a Heegner number.Since 18! + 1 is divisible by 67 but 67 is not one more than a multiple of...

68 68 is the natural number following 67 and preceding 69.In mathematics:Sixtyeight is a nontotient. It is also a Perrin number, preceded in the sequence by 29, 39, 51...

69 69 is a number following 68 and preceding 70. In mathematics:The aliquot sum of sixtynine is 27 within the aliquot sequence 69 being the third composite number in the 13aliquot tree.69 is a semiprime...

70 70 is the natural number following 69 and preceding 71.In mathematics:Its factorization makes it a sphenic number. 70 is a Pell number and a generalized heptagonal number, one of only two numbers to be both. Also, it is the seventh pentagonal number and the fourth 13gonal number, as well as the...

7171 is the natural number following 70 and preceding 72.In mathematics:71 is the algebraic degree of Conway's constant, a remarkable number arising in the study of lookandsay sequences....

72 72 is the natural number following 71 and preceding 73. It is half a gross or 6 dozen .In mathematics:...

73 73 is the natural number following 72 and preceding 74. In English, it is the smallest integer with twelve letters in its spelled out name. In mathematics :...

74 74 is the natural number following 73 and preceding 75.A seventyfour was a thirdrate warship with 74 guns.In mathematics:Seventyfour is the twentyfirst distinct semiprime and the eleventh of the form 2×q...

75 75 is the natural number following 74 and preceding 76.In mathematics:As the sum of the first five pentagonal numbers, seventyfive is a pentagonal pyramidal number. It is also an enneagonal number....

7676 is the natural number following 75 and preceding 77.In mathematics:Seventysix is a Lucas number, an automorphic number, a nontotient, a 14gonal number, and a centered pentagonal number....

77 77 is the natural number following 76 and preceding 78. Seventyseven is the smallest positive integer requiring five syllables in English.In mathematics:...

7878 is the natural number following 77 and followed by 79.In mathematics:78 is a triangular number, and its factorization makes it a sphenic number...

79 Seventynine is the natural number following 78 and preceding 80.79 may represent:In mathematics:*An odd number*The smallest number that can't be represented as a sum of fewer than 19 fourth powers*A strictly nonpalindromic number...

8080 is the natural number following 79 and preceding 81. In mathematics :The sum of Euler's totient function φ over the first sixteen integers is 80....

8181 is the natural number following 80 and preceding 82.In mathematics:Eightyone is the square of 9 and the fourth power of 3. Like all powers of three, 81 is a perfect totient number. It is a heptagonal number and a centered octagonal number. It is also a tribonacci number, and an open meandric...

8282 is the natural number following 81 and preceding 83.In mathematics:Eightytwo is the twentythird biprime and the twelfth of the form...

83 83 is the natural number following 82 and preceding 84.In mathematics:Eightythree is the sum of three consecutive primes as well as the sum of five consecutive primes ....

8484 is the natural number following 83 and preceding 85. In mathematics :Eightyfour is the sum of the first seven triangular numbers , as well as the sum of a twin prime...

8585 is the natural number following 84 and preceding 86.In mathematics:85 is an octahedral number, a centered triangular number, a centered square number, a decagonal number, and a Smith number....

86 86 is the natural number following 85 and preceding 87.In mathematics:86 is the 25th distinct semiprime and the 13th of the form...

87 87 is the natural number following 86 and preceding 88.In mathematics:Eightyseven is the twentysixth distinct semiprime and the eighth of the form . The aliquot sum of 87 is 33 within the aliquot sequence 86 being the eighteenth composite number in the 3aliquot tree.Eightyseven is the sum of...

8888 is the natural number following 87 and preceding 89. In mathematics :EightyEight is a refactorable number, a primitive semiperfect number and an untouchable number...

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9090 is the natural number preceded by 89 and followed by 91. In mathematics :*Because 90 is the sum of its unitary divisors , it is a unitary perfect number, and because it is equal to the sum of a subset of its divisors, it is a semiperfect number. 90 is a pronic number. But it is also a...

91 91 is the natural number following 90 and preceding 92.In mathematics:Ninetyone is the twentyseventh distinct semiprime and the second of the form...

92 92 is the natural number following 91 and preceding 93. In mathematics:Ninetytwo is a pentagonal number.There are 92 Johnson solids...

93 93 is the natural number following 92 and preceding 94.In mathematics:Ninetythree is the twentyeighth distinct semiprime and the ninth of the form...

94 94 is the natural number following 93 and preceding 95.In mathematics:Ninetyfour is the twentyninth distinct semiprime and the fourteenth of the form...

9595 is the natural number following 94 and preceding 96.In mathematics:Ninetyfive is the thirtieth distinct semiprime and the fifth of the form...

96 96 is the natural number following 95 and preceding 97.In mathematics:Ninetysix is an octagonal number, a refactorable number and an untouchable number. Since it is a multiple of 6, it is a semiperfect number...

97 97 is the natural number following 96 and preceding 98.In mathematics:97 is the 25th prime number , following 89 and preceding 101. 97 is a Proth prime as it is 3 × 25 + 1.The numbers 97, 907, 9007, 90007 and 900007 are happy primes...

9898 is the natural number following 97 and preceding 99.In astronomy:* Messier 98, a magnitude 11.0 spiral galaxy in the constellation Coma Berenices....

99 99 is the natural number following 98 and preceding 100.Mathematics:99 is the ninth repdigit, a palindromic number and a Kaprekar number...

100 100 is the natural number following 99 and preceding 101.In mathematics:One hundred is the square of 10...

101 101 is the natural number following 100 and preceding 102.It is variously pronounced "one hundred and one" / "a hundred and one", "one hundred one" / "a hundred one", and "one oh one"...

102 102 is the natural number following 101 and preceding 103.In mathematics:102 is an abundant number and semiperfect number. It is a sphenic number...

103 103 is the natural number following 102 and preceding 104.In mathematics:One hundred [and] three is the 27th prime number. The previous prime is 101, making them both twin primes...

104 104 is the natural number following 103 and preceding 105. In mathematics :One hundred [and] four is a primitive semiperfect number and a composite number, with its divisors being 1, 2, 4, 8, 13, 26, 52 and 104. As it has 8 divisors total, and 8 is one of those divisors, 104 is a refactorable...

105 105 is the natural number following 104 and preceding 106.In mathematics:105 is a triangular number, a 12gonal number and a Zeisel number. It is a sphenic number, and is the product of three consecutive prime numbers. 105 is the double factorial of 7...

106 106 is the natural number following 105 and preceding 107.In mathematics:106 is the thirtyfirst distinct biprime and the fifteenth of the form...

107 107 is the natural number following 106 and preceding 108.In mathematics:One hundred [and] seven is the 28th prime number. The next prime is 109, with which it comprises a twin prime, making 107 a Chen prime....

108108 is the natural number following 107 and preceding 109. In mathematics :One hundred [and] eight is an abundant number and a semiperfect number...

109 109 is the natural number following 108 and preceding 110.In mathematics:One hundred [and] nine is the 29th prime number, and also a Chen prime. The previous prime is 107, making them both twin primes...

110 110 is the natural number following 109 and preceding 111.It is also known as "eleventy", a term made famous by linguist and author J. R. R...

111 111 is the natural number following 110 and preceding 112. It is the lowest positive integer requiring six syllables to name in American English, or seven syllables in Canadian and British English...

112 112 is the natural number following 111 and preceding 113.In mathematics:One hundred [and] twelve is an abundant number and a heptagonal number...

113 113 is the natural number following 112 and preceding 114.In mathematics:One hundred [and] thirteen is the 30th prime number, following 109 and preceding 127, a Sophie Germain prime, a Chen prime and a Proth prime as it is a prime number of the form 7 × 24 + 1...

114 114 is the natural number following 113 and preceding 115.In mathematics:*One hundred [and] fourteen is an abundant number, a sphenic number and a Harshad number. It is the sum of the first four hyperfactorials, including H...

115 115 is the natural number following 114 and preceding 116.In mathematics:115 is a heptagonal pyramidal number and a lucky number....

116 116 is the natural number following 115 and preceding 117.In mathematics:116 is a noncototient, meaning that there is no solution to the equation , where stands for Euler's totient function. 116! + 1 is prime...

117 117 is the natural number following 116 and preceding 118.In mathematics:One hundred seventeen is the smallest possible length of the longest side of a Heronian tetrahedron .117 is a pentagonal number.In base 10, it is a Harshad number.In other fields:One hundred seventeen is also:* The...

118 118 is the natural number following 117 and preceding 119.In mathematics:There is no answer to the equation φ = 118, making 118 a nontotient.118 is the smallest n such that the range n, n + 1, .....

119 119 is the natural number following 118 and preceding 120. Mathematics :* 119 is a Perrin number, preceded in the sequence by 51, 68, 90 ....

120 120 is the natural number following 119 and preceding 121. 120 was known as "the great hundred", especially prior to the year 1700, from the Teutonic Hundert which equalled 120. The number 100, now known commonly as "one hundred" was then known as "the small hundred". It is also known as...

121 121 is the natural number following 120 and preceding 122.In mathematics:One hundred [and] twentyone is a square and is the sum of three consecutive primes . There are no squares besides 121 known to be of the form 1 + p + p^2 + p^3 + p^4, where p is prime...

122 122 is the natural number following 121 and preceding 123.In mathematics:It is a nontotient since there is no integer with exactly 122 coprimes below it...

123 123 is the natural number following 122 and preceding 124.In mathematics:* 123 is a Lucas number...

124 124 is the natural number following 123 and preceding 125.In mathematics:124 is the sum of eight consecutive primes...

125 125 is the natural number following 124 and preceding 126.In mathematics:One hundred [and] twentyfive is the cube of 5....

126 126 is the natural number following 125 and preceding 127.In mathematics:One hundred [and] twentysix is a pentagonal pyramidal number, and a decagonal number as well as a pentatope number....

127 127 is the natural number following 126 and preceding 128. In mathematics :*As a Mersenne prime, 127 is related to the perfect number 8128. 127 is also an exponent for the Mersenne prime 2127  1, making 127 a double Mersenne prime...

128 128 is the natural number following 127 and preceding 129.In mathematics:One hundred [and] twentyeight is the seventh power of 2. It is the largest number which cannot be expressed as the sum of any number of distinct squares...

129 129 is the natural number following 128 and preceding 130.In mathematics:129 is the sum of the first ten prime numbers...

130 130 is the natural number following 129 and preceding 131.In mathematics:130 is a sphenic number. It is a noncototient since there is no answer to the equation x  φ = 130....

131 131 is the natural number following 130 and preceding 132.In mathematics:131 is a Sophie Germain prime, the second 3digit palindromic prime, and also a permutable prime with 113 and 311. It can be expressed as the sum of three consecutive primes, 131 = 41 + 43 + 47. 131 is an Eisenstein prime...

132 132 is the natural number following 131 and preceding 133.In mathematics:132 is the sixth Catalan number. It is a pronic number, the product of 11 and 12. As it has 12 divisors total, 132 is a refactorable number....

133 133 is the natural number following 132 and preceding 134.In mathematics:133 is an n whose divisors added up divide φ. It is an octagonal number and a Harshad number...

134 134 is the natural number following 133 and preceding 135.In mathematics:134 is a nontotient since there is no integer with exactly 134 coprimes below it. And it is a noncototient since there is no integer with 134 integers with common factors below it...

135 135 is the natural number following 134 and preceding 136.In mathematics:This number in base 10 can be expressed in operations using its own digits in at least two different ways...

136 136 is the natural number following 135 and preceding 137.In mathematics:136 is itself a factor of the Eddington number...

137 137 is the natural number following 136 and preceding 138.In mathematics :One hundred [and] thirtyseven is the 33rd prime number; the next is 139, with which it comprises a twin prime, and thus 137 is a Chen prime. 137 is an Eisenstein prime with no imaginary part and a real part of the form 3n ...

138 138 is the natural number following 137 but before 139.In mathematics:* Its factorization makes 138 a sphenic number* The sum of four consecutive primes...

139 139 is the natural number following 138 and preceding 140.In mathematics:One hundred [and] thirtynine is the 34th prime number, so it is divisible only by itself and 1. It is a twin prime with 137. Because 141 is a semiprime, 139 is a Chen prime...

140 140 is the natural number following 139 and preceding 141.In mathematics:140 is an abundant number and a harmonic divisor number...

141 141 is the natural number following 140 and preceding 142.In mathematics:141 is a centered pentagonal number. It is the sum of the sums of divisors of the first thirteen integers....

142 142 is the natural number following 141 and preceding 143.In astrophysics:* 142 Polana is a dark Main belt asteroid* HD 142 is a 6th magnitude star in the Phoenix constellationIn business and accounting:...

143 143 is the natural number following 142 and preceding 144.In mathematics:143 is the sum of three consecutive primes , as well as the sum of seven consecutive primes...

144 144 is the natural number following 143 and preceding 145. 144 is a dozen dozens, or one gross.In mathematics:It is the twelfth Fibonacci number, and the largest one to also be a square, as the square of 12 , following 89 and preceding 233.144 is the smallest number with exactly 15 divisors.144 is...

145 145 is the natural number following 144 and preceding 146. In mathematics :* Although composite, 145 is a pseudoprime.* Given 145, the Mertens function returns 0.* 145 is a pentagonal number and a centered square number....

146 146 is the natural number following 145 and preceding 147.In mathematics:146 is an octahedral number as well as a composite number....

147 147 is the natural number following 146 and preceding 148.In mathematics:There are 147 onesided 6polyhexes.The digits forming 147 also form the lefthand column of a normal decimal numeric keypad....

148 148 is the natural number following 147 and before 149.In mathematics:* 148 is the second number to be both a heptagonal number and a centered heptagonal number * 148 is the twelfth member of the Mian–Chowla sequence...

149 149 is the natural number between 148 and 150. It is also a prime number.In mathematics:*149 is the 35th prime number, and with the next prime number, 151, is a twin prime, thus 149 is a Chen prime. 149 is a strong prime in the sense that it is more than the arithmetic mean of its two neighboring...

150 150 is the natural number following 149 and preceding 151. In mathematics :*150 is the sum of eight consecutive primes...

151 151 is a natural number. It follows 150 and precedes 152.In mathematics:151 is the 36th prime number, the previous is 149, with which it comprises a twin prime. 151 is also a palindromic prime. 151 is a centered decagonal number...

152 152 is the natural number following 151 and preceding 153.In mathematics:152 is the sum of four consecutive primes...

153 One hundred fiftythree is the natural number following one hundred fiftytwo and preceding one hundred fiftyfour.Mathematical properties:...

154 One hundred and fiftyfour is the natural number following one hundred and fiftythree and preceding one hundred and fiftyfive.In mathematics:* 154 is a nonagonal number...

155 155 is the natural number following 154 and preceding 156. It is a composite number....

156 156 is the number equal to 100 + 50 + 6, following 155 and followed by 157.In mathematics:It is a pronic number, a dodecagonal number, a refactorable number and a Harshad number.156 is a repdigit in base 5 .In the military:...

157 157 is the number equal to 100 + 50 + 7, following 156 and preceding 158.In mathematics:* 157 is a prime number. The next prime is 163 and the previous prime is 151, which with 157 form a sexy prime triplet. Taking the arithmetic mean of those primes yields 157, thus it is a balanced prime.* In...

158 158 is an even whole number following 157 and preceding 159.In mathematics:* 158 is a nontotient, since there is no integer with 158 coprimes below it.* 158 is a Perrin number, appearing after 68, 90, 119....

159 159 is a natural number following 158 and preceding 160.In mathematics:* 159 is the sum of 3 consecutive prime numbers: 47 + 53 + 59* The previous prime number is 157, and the next is 163* Given 159, the Mertens function returns 0...

160 160 is the natural number following 159 and preceding 161.In mathematics:* 160 is the sum of the first 11 primes, as well as the sum of the cubes of the first three primes* Given 160, the Mertens function returns 0...

161 161 is an odd natural number between 160 and 162In geography:* Bahrain and Brunei each have coastlines that are 161 kilometers in length.* Bhutan ranks #161 in world population...

162 162 is an even natural number between 161 and 163.In mathematics:162 is divisible by 2, 3, 6, 9, 18, 27, 54, and 81. But there is no positive integer such that its divisors add up to 162, hence 162 is an untouchable number....

163 163 is the natural number following 162 and preceding 164.In mathematics:163 is a strong prime in the sense that it is greater than the arithmetic mean of its two neighboring primes...

164 164 is the natural number following 163 and preceding 165.In mathematics:* 164 is an even number* 164 is a composite number* 164 is a zero of the Mertens function* 164 is the sum of two squares, 10^2 + 8^2....

165 165 is the natural number following 164 and preceding 166.In mathematics:* 165 is an odd number* 165 is a composite number* 165 is a deficient number* 165 is a binary palindromic number * 165 is a sphenic number...

166 166 is the natural number following 165 and preceding 167.In mathematics:* 166 is an even number* 166 is a composite number and a Smith number in base 10* Given 166, the Mertens function returns 0...

167 167 is the natural number following 166 and preceding 168.In mathematics:* 167 is an odd number* 167 is a Chen prime, since the next odd number, 169, is a square of a prime...

168 168 is the natural number following 167 and preceding 169.In mathematics:* 168 is an even number* 168 is an abundant number, as 312 is greater than 168* 168 is a composite number* There are 168 primes less than 1000...

169 169 is the natural number following 168 and preceding 170.In mathematics:* 169 is an odd number* 169 is a square number. 13 x 13 = 169, and the reverse 31 x 31 = 961...

170 170 is the natural number following 169 and preceding 171.In mathematics:170 is the smallest n for which φ and σ are both square. But 170 is never a solution for φ, making it a nontotient...

171 171 is the natural number following 170 and preceding 172.In mathematics:* 171 is an odd number* 171 is a composite number* 171 is a deficient number* 171 is a Harshad number, divisible by the sum of its digits...

172 172 is the natural number following 171 and preceding 173.In mathematics:* 172 is an even number* 172 is a composite number* 172 is a deficient number* 172 is a noncototient integer...

173 173 is the natural number following 172 and preceding 174.In mathematics:* 173 is an odd number* 173 is a balanced prime* 173 is a deficient number* 173 is an Eisenstein prime with no imaginary part* 173 is an Odious number* 173 is a prime number...

174 174 is the natural number following 173 and preceding 175.In mathematics:* 174 is an even number* 174 is an abundant number with the abundance of 12* 174 is a composite number* 174 is a nontotient number* 174 is an odious number...

175 175 is the natural number following 174 and preceding 176.In mathematics:* 175 is an odd number* 175 is a composite number* 175 is a decagonal number, a figurate number that represents a decagon* 175 is a deficient number, as 73 is less than 175...

176 176 is the natural number following 175 and preceding 177.In mathematics:* 176 is an even number* 176 is an abundant number, as 196 is greater than 176* 176 is a cake number* 176 is a composite number...

177 177 is the natural number following 176 and preceding 178.In mathematics:* 177 is an odd number* 177 is a composite number* 177 is a deficient number, as 63 is less than 177* 177 is a Leyland number since it can be expressed as 27 + 72...

178 178 is the natural number following 177 and preceding 179.In mathematics:* 178 is an even number* 178 is a composite number* 178 is a deficient number, as 92 is less than 178* 178 is a semiprime, a product of two primes, namely 2 and 89...

179 179 is the natural number following 178 and preceding 180.In mathematics:* 179 is an odd number* 179 is a deficient number, as 1 is less than 179* 179 is a Gaussian number* 179 is an odious number* 179 is a squarefree number...

180 180 is the natural number following 179 and preceding 181.In mathematics:180 is an abundant number, with its proper divisors summing up to 366. 180 is also a highly composite number, a positive integer with more divisors than any smaller positive integer...

181 181 is the natural number between 180 and 182.In mathematics:* 181 is an odd number* 181 is a centered number** 181 is a centered pentagonal number** 181 is a centered 12gonal number** 181 is a centered 18gonal number...

182 182 is the natural number following 181 and preceding 183.In mathematics:* 182 is an even number* 182 is a composite number, as it is a positive integer with a positive divisor other than one or itself* 182 is a deficient number, as 154 is less than 182...

183 183 is the natural number following 182 and preceding 184.In mathematics:* 183 is an odd number* 183 is a central polygonal number, n^2  n + 1, where n=14 * 183 is a composite number* 183 is a deficient number, as 65 is less than 183...

184 184 is the natural number following 183 and preceding 185.In mathematics:* 184 is an even number* 184 is a composite number* 184 is a deficient number, as 176 is less than 184...

185 185 is the natural number following 184 and preceding 186.In mathematics:* 185 is an odd number* 185 is a composite number* 185 is a deficient number, as 43 is less than 185* 185 is an odious number* 185 is a squarefree number...

186 186 is the natural number following 185 and preceding 187.In mathematics:* 186 is an even number* 186 is an abundant number, as 198 is greater than 186* 186 is a composite number* There is no integer with exactly 186 coprimes less than it...

187 187 is the natural number following 186 and preceding 188.In mathematics:* 187 is an odd number* 187 is a composite number* 187 is a deficient number, as 29 is less than 187* 187 is a self number* 187 is a squarefree number...

188 188 is the natural number following 187 and preceding 189.In mathematics:* 188 is an even number* 188 has 6 divisors: 1, 2, 4, 47, 94, 188* 188 is a composite number* 188 is a deficient number, as 148 is less than 188* 188 is a happy number...

189 189 is the natural number following 188 and preceding 190.In mathematics:* 189 is an odd number* 189 is a centered cube number* 189 is a composite number* 189 is a deficient number, as 131 is less than 189* 189 is a heptagonal number...

190 190 is the natural number following 189 and preceding 191.In mathematics:* 190 is an even number* 190 is a centered nonagonal number* 190 is a composite number* 190 is a deficient number, as 170 is less than 190...

191 191 is the natural number following 190 and preceding 192.In mathematics:* 191 is an odd number* 191 is a centered 19gonal number* 191 is a deficient number, as 1 is less than 191...

192 192 is the natural number following 191 and preceding 193.In mathematics:* 192 is an even number* 192 is the sum of ten consecutive primes...

193 193 is the natural number following 192 and preceding 194.In mathematics:* 193 is an odd number* 193 is a centered 32gonal number* 193 is a deficient number, as 1 is less than 193* 193 is a happy number* 193 is a lucky number...

194 194 is the natural number following 193 and preceding 195.In mathematics:* 194 is an even number* 194 is a composite number* 194 is a deficient number, as 100 is less than 194...

195 195 is the natural number following 194 and preceding 196.In mathematics:* 195 is an odd number* 195 is a composite number* 195 is a deficient number, as 141 is less than 195* 195 is a Harshad number* 195 is a lucky number...

196 196 is the natural number following 195 and preceding 197.In mathematics:* 196 is an even number* 196 is an abundant number, as 203 is greater than 196* 196 is a composite number...

197 197 is the natural number following 196 and preceding 198.In mathematics:* 197 is an odd number* 197 is a prime number** 197 is a Chen prime** 197 is an Eisenstein prime with no imaginary part** 197 is a strong prime** 197 is a twin prime with 199...

198 198 is the natural number following 197 and preceding 199.In mathematics:* 198 is an even number* 198 is an abundant number, as 270 is greater than 198* 198 is a composite number* 198 is a Harshad number, divisible by the sum of its digits...

199 199 is the natural number following 198 and preceding 200.In mathematics:* 199 is an odd number* 199 is a centered triangular number* 199 is a centered 33gonal number* 199 is a deficient number, as 1 is less than 199* 199 is a Lucas number...

200 200 is the natural number following 199 and preceding 201.The number appears in the Padovan sequence, preceded by 86, 114, 151 ....

201 201 is the natural number following 200 and preceding 202. It may be written as "two hundred one" or "two hundred and one".In mathematics:As the two factors of 201 are both Gaussian primes, 201 is a Blum integer.201 is a Harshad number in base 10....

202 202 is the natural number following 201 and preceding 203. It may be written as "two hundred two" or "two hundred and two".In mathematics:...

203 203 is the natural number following 202 and preceding 204. It may be written as "two hundred three" or "two hundred and three".In mathematics:203 is the 6th Bell number, i.e. it is the number of partitions of a set of size 6...

204 204 is the natural number following 203 and preceding 205. It may be written as "two hundred four" or "two hundred and four".In mathematics:...

205 205 is the natural number following 204 and preceding 206. It may be written as "two hundred five" or "two hundred and five".In other fields:* 205 Martha is a large Main belt asteroid....

206 206 is the natural number following 205 and preceding 207. It may be written as two hundred six or two hundred and six. It is both a nontotient and a noncototient. It is the lowest positive integer to employ all of the vowels once only...

207 207 is the natural number following 206 and preceding 208. It may be written as "two hundred seven" or "two hundred and seven".In other fields:* The Year 207 AD* 207 Hedda is a sizeable Main belt asteroid....

208 208 is the natural number following 207 and preceding 209. It may be written as "two hundred eight" or "two hundred and eight".In mathematics:* 208 is a tetranacci number* 208 is the sum of the squares of the first five primesIn other fields:...

209 209 is the natural number following 208 and preceding 210. It is written as "two hundred and nine".In mathematics:* 209 is a highly cototient number* 209 is a Harshad number* 209 is a self number* 209=16+25+34+43+52+61In other fields:...


210 210 is the natural number following 209 and preceding 211. In mathematics :210 is a composite number, an abundant number, and the product of the first four prime numbers , and thus a primorial...

220 220 is the natural number following 219 and preceding 221.In mathematics:It is a composite number, with its divisors being 1, 2, 4, 5, 10, 11, 20, 22, 44, 55 and 110, making it an amicable number with 284...

230 230 is the natural number following 229 and preceding 231.In mathematics:It is a composite number, with its divisors being 2, 5, 10, 23, 46, and 115. Its factorisation makes it a sphenic number. There is no integer with 230 coprimes below it, thus 230 is a nontotient...

240 240 is the natural number following 239 and preceding 241.In mathematics:With 20 divisors total , more than any previous number, 240 is a highly composite number, and it is also a refactorable number or tau number, since it has 20 divisors and 20 divides 240...

250 250 is the natural number following 249 and preceding 251.As a Mandarin slang term, 250 is an insult meaning "stupid person" or "simpleton". The expression is based on bàndiàozi...

260 260 is the magic constant of the n×n normal magic square and nqueens problem for n = 8, the size of an actual chess board....

270 270 is the natural number following 269 and preceding 271.In mathematics:*270 is a harmonic divisor number*270 is the fourth number that is divisible by its average integer divisor...

280 280 is the natural number after 279 and before 281.In mathematics:The denominator of the eighth harmonic number, 280 is an octagonal number.There are 280 plane trees with ten nodes....

290 290 is the natural number after 289 and before 291.In mathematics:The product of three primes, 290 is a sphenic number, and the sum of four consecutive primes . The sum of the squares of the divisors of 17 is 290...




300 300 is the natural number following 299 and preceding 301. Mathematical properties :It is a triangular number and the sum of a pair of twin primes , as well as the sum of ten consecutive primes...

400 400 is the natural number following 399 and preceding 401.  Mathematical properties :400 is the square of 20.A circle is divided into 400 grads, which is equal to 360 degrees and 2π radians...

500 500 is the natural number following 499 and preceding 501. Other fields :Five hundred is also*many NASCAR races often use the number 500 at the end of their race names 500 (five hundred) is the natural number following 499 and preceding 501. Other fields :Five hundred is also*many NASCAR races...

600 For the year 600, see 600 BC or 600 AD.600 is the natural number following 599 and preceding 601.Mathematical properties:Six hundred is a composite number, an abundant number, a pronic number and a Harshad number.In other fields:...

700 700 is the natural number following 699 and preceding 701.It is the sum of four consecutive primes...

800800 is the natural number following 799 and preceding 801.It is the sum of four consecutive primes...

900 For the year 900, see 900 BC or 900 AD.900 is the natural number following 899 and preceding 901. It is the square of 30 and the sum of Euler's totient function for the first 54 integers...


1000 
2000 2000 is the natural number following 1999 and preceding 2001.Two thousand is the highest number expressible using only two unmodified characters in roman numerals .Two thousand is also:...

3000 3000 is the natural number following 2999 and preceding 3001. It is the smallest number requiring thirteen letters in English . In other fields :...

4000 4000 is the natural number following 3999 and preceding 4001. It is a decagonal number. Selected numbers in the range 4001–4999 :* 4005 – triangular number* 4007 – safe prime...

5000 5000 is the natural number following 4999 and preceding 5001. Five thousand is the largest isogrammic number in the English language.Selected numbers in the range 5001–5999:* 5003 – Sophie Germain prime...

6000 6000 is the natural number following 5999 and preceding 6001.Selected numbers in the range 6001–6999:* 6025 – Rhythm guitarist of the Dead Kennedys from June 1978 to March 1979...

7000 7000 is the natural number following 6999 and preceding 7001.Selected numbers in the range 7001–7999:* 7021 – triangular number* 7043 – Sophie Germain prime* 7056 – 84^2...

8000 8000 is the natural number following 7999 and preceding 8001.8000 is the cube of 20, as well as the sum of four consecutive integers cubed, 113 + 123 + 133 + 143....

9000 9000 is the natural number following 8999 and preceding 9001.In other fields:* ISO 9000 is the ISO's standard for Quality Management System in production environments...


10000 10000 is the natural number following 9999 and preceding 10001.Name:Many languages have a specific word for this number: In English it is myriad, in Ancient Greek , in Aramaic , in Hebrew רבבה , in Chinese , in Japanese [man], in Korean [man], and in Thai หมื่น [meun]...

20000 20,000 is the number that comes after 19,999 and before 20,001.Selected numbers:* 20000 – round number; also in the title of Jules Verne's novel 20,000 Leagues Under The Sea...

30000 30,000 is the number that comes after 29,999 and before 30,001.Selected numbers:* 30000 – round number* 30029 – primorial prime* 30030 – primorial* 30240 – harmonic divisor number...

40000 40,000 is the number that comes after 39,999 and before 40,001. It is the square of 200.Selected numbers:* 40000 – round number* 40320 – smallest factorial that is not a highly composite number...

50000 50,000 is the number that comes after 49,999 and before 50,001.Selected numbers:* 50000 – round number* 50625 – smallest fourth power that can be expressed as the sum of only five distinct fourth powers...

60000 60,000 is the number that comes after 59,999 and before 60,001.Selected numbers:* 60000 – round number* 60049 – Leyland number* 62210 – Markov number* 62745 – Carmichael number...

70000 70,000 is the number that comes after 69,999 and before 70,001.Selected numbers:* 70000 – round number* 71656 – pentagonal pyramidal number* 73712 – number of nQueens Problem solutions for n = 13,...

80000 80,000 is the number that comes after 79,999 and before 80,001.Selected numbers:* 80000 – round number* 80286 – model number of the Intel 80286 chip* 80386 – model number of the Intel 80386 chip...

90000 90,000 is the number that comes after 89,999 and before 90,001.Selected numbers:* 90000 – sum of the cubes of the first 24 positive integers* 90625 – the only fivedigit automorphic number* 93312 – Leyland number...

100k–1M One hundred thousand is the natural number following 99999 and preceding 100001. In scientific notation, it is written as 105.In South Asia, one hundred thousand is called a lakh...

1M–10M 
10M–100M Ten million is the natural number following 9999999 and preceding 10000001.In scientific notation, it is written as 107.In South Asia, it is known as the Crore. Selected 8digit numbers :*10077696 = 69...

100M–1G One hundred million is the natural number following 99999999 and preceding 100000001.In scientific notation, it is written as 108....

1G–10G1,000,000,000 is the natural number following 999,999,999 and preceding 1,000,000,001.In scientific notation, it is written as 109....

10G–100G 
100G–1000G 
Larger numbers This list contains selected positive numbers in increasing order, including counts of things, dimensionless quantity and probabilities. Each number is given a name in the short scale, which is used in English speaking countries, as well as a name in the long scale, which is used in some of the...
