243 (number)

← 242 243 244 →
← 200 210 220 230 240 250 260 270 280 290 → List of numbers — Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	two hundred forty-three
Ordinal	243rd (two hundred and forty-third)
Factorization	3^5
Roman numeral	CCXLIII
Binary	111100112
Ternary	1000003
Quaternary	33034
Quinary	14335
Senary	10436
Octal	3638
Duodecimal	18312
Hexadecimal	F316
Vigesimal	C320
Base 36	6R36

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

In mathematics

243 is:

• the largest 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
• The .243 Winchester is a very popular sporting rifle round
• The number of Earth Days for the planet Venus to complete one Venusian day, one revolution