243

243 is a natural number that follows 242 and precedes 244. It is the fifth power of 3, since 3^5 = 243.

In numeral systems, 243 has several representations: in base 3 it is written as 100000, in decimal as 243, in binary as 11110011, in octal as 363, and in hexadecimal as F3.

243 factors as 3^5, so its only prime factor is 3. The sum of its decimal digits is 9, and 243 is divisible by 9 (243 ÷ 9 = 27), making it a Harshad number in base 10.

In the context of international dialing, the country calling code +243 is assigned to the Democratic Republic of the Congo.

Because it equals 3^5, 243 is a perfect power but not a perfect cube (6^3 = 216 and 7^3 = 343). It sits between these two cubes.