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243 (number)

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243
  
244 →

Roman numeral
  
CCXLIII

Factorization
  
3

Binary
  
111100112

Cardinal
  
two hundred forty-three

Ordinal
  
243rd (two hundred and forty-third)

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

Contents

In mathematics

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.
  • a Harshad number.

    • In other fields

    243 is:

  • the Calling code for the Democratic Republic of the Congo, the country once known as Zaire.
  • the year 243 AD or 243 BC.
  • Aloha Airlines Flight 243 which suffered an explosive decompression near Maui, HI on April 28, 1988
  • .243 Winchester and .243 WSSM, rifle rounds
  • The number of Earth Days for the planet Venus to complete one Venusian day, one revolution

    • References

    243 (number) Wikipedia
    (Text) CC BY-SA