243 (number)

243 (two hundred [and] forty-three) is the natural number following 242 and preceding 244.

242 243 244
Cardinaltwo hundred forty-three
Ordinal243rd
(two hundred forty-third)
Factorization35
Greek numeralΣΜΓ´
Roman numeralCCXLIII
Binary111100112
Ternary1000003
Senary10436
Octal3638
Duodecimal18312
HexadecimalF316

Additionally, 243 is:

  • the only 3-digit number that is a fifth power (35).
  • a perfect totient number.
  • the sum of five consecutive prime numbers (41 + 43 + 47 + 53 + 59).
  • an 82-gonal number.
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