243 (number)
Encyclopedia
243 is the natural number
following 242
and preceding 244.
Natural number
In mathematics, the natural numbers are the ordinary whole numbers used for counting and ordering . These purposes are related to the linguistic notions of cardinal and ordinal numbers, respectively...
following 242
242 (number)
242 is the natural number following 241 and preceding 243.-In mathematics:242 is the smallest integer to start a run of four consecutive integers with the same number of divisors.242 is a nontotient since there is no integer with 242 coprimes below it....
and preceding 244.
In mathematics
243 is:- the largest 3-digit number that is a fifth power (35).
- a perfect totient numberPerfect totient numberIn number theory, a perfect totient number is an integer that is equal to the sum of its iterated totients. That is, we apply the totient function to a number n, apply it again to the resulting totient, and so on, until the number 1 is reached, and add together the resulting sequence of numbers;...
. - the sum of five consecutive prime numbers (41 + 43 + 47 + 53 + 59).
- an 82-gonal number.
- a Harshad numberHarshad numberA Harshad number, or Niven number in a given number base, is an integer that is divisible by the sum of its digits when written in that base. Harshad numbers were defined by D. R. Kaprekar, a mathematician from India. The word "Harshad" comes from the Sanskrit + , meaning joy-giver. The Niven...
.
In other fields
243 is:- the Calling code for ZaireZaireThe Republic of Zaire was the name of the present Democratic Republic of the Congo between 27 October 1971 and 17 May 1997. The name of Zaire derives from the , itself an adaptation of the Kongo word nzere or nzadi, or "the river that swallows all rivers".-Self-proclaimed Father of the Nation:In...
. - the number of isotopes or variations of elements calculated by Dr. Plichta.
- the year 243 CE243Year 243 was a common year starting on Sunday of the Julian calendar. At the time, it was known as the Year of the Consulship of Arrianus and Papus...
or 243 BCE243 BCYear 243 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Fundulus and Galus...
. - Aloha Airlines Flight 243Aloha Airlines Flight 243Aloha Airlines Flight 243 was a scheduled Aloha Airlines flight between Hilo and Honolulu in Hawaii. On April 28, 1988, a Boeing 737-200 serving the flight suffered extensive damage after an explosive decompression in flight, but was able to land safely at Kahului Airport on Maui. The only...
which crashed near Maui, HI on April 28, 1988 - The .243 Winchester.243 WinchesterThe .243 Winchester is a popular sporting rifle cartridge. Initially designed as a varmint round, it is now more frequently used on medium to large game such as whitetail deer, mule deer, pronghorn, wild hogs, and even black bear and caribou...
is a very popular sporting rifle round - The number of Earth Days for the planet Venus to complete one Venetian day, one revolution