243 (number)

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

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.