242205289 has 2 divisors, whose sum is σ = 242205290. Its totient is φ = 242205288.

The previous prime is 242205287. The next prime is 242205317. The reversal of 242205289 is 982502242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208658025 + 33547264 = 14445^2 + 5792^2 .

It is a cyclic number.

It is not a de Polignac number, because 242205289 - 2¹ = 242205287 is a prime.

Together with 242205287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (242205287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121102644 + 121102645.

It is an arithmetic number, because the mean of its divisors is an integer number (121102645).

Almost surely, 2^242205289 is an apocalyptic number.

It is an amenable number.

242205289 is a deficient number, since it is larger than the sum of its proper divisors (1).

242205289 is an equidigital number, since it uses as much as digits as its factorization.

242205289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 242205289 is about 15562.9460257369. The cubic root of 242205289 is about 623.3441301062.

The spelling of 242205289 in words is "two hundred forty-two million, two hundred five thousand, two hundred eighty-nine".