242252531 has 2 divisors, whose sum is σ = 242252532. Its totient is φ = 242252530.

The previous prime is 242252467. The next prime is 242252581. The reversal of 242252531 is 135252242.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242252531 - 2⁶ = 242252467 is a prime.

It is a super-2 number, since 2×242252531² = 117372577551811922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 242252531.

It is not a weakly prime, because it can be changed into another prime (242252581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121126265 + 121126266.

It is an arithmetic number, because the mean of its divisors is an integer number (121126266).

Almost surely, 2^242252531 is an apocalyptic number.

242252531 is a deficient number, since it is larger than the sum of its proper divisors (1).

242252531 is an equidigital number, since it uses as much as digits as its factorization.

242252531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800, while the sum is 26.

The square root of 242252531 is about 15564.4637234953. The cubic root of 242252531 is about 623.3846551075.

The spelling of 242252531 in words is "two hundred forty-two million, two hundred fifty-two thousand, five hundred thirty-one".