242504531 has 2 divisors, whose sum is σ = 242504532. Its totient is φ = 242504530.

The previous prime is 242504527. The next prime is 242504533. The reversal of 242504531 is 135405242.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242504531 - 2² = 242504527 is a prime.

It is a super-2 number, since 2×242504531² = 117616895111059922, which contains 22 as substring.

Together with 242504533, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242504531.

It is not a weakly prime, because it can be changed into another prime (242504533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121252265 + 121252266.

It is an arithmetic number, because the mean of its divisors is an integer number (121252266).

Almost surely, 2^242504531 is an apocalyptic number.

242504531 is a deficient number, since it is larger than the sum of its proper divisors (1).

242504531 is an equidigital number, since it uses as much as digits as its factorization.

242504531 is an odious number, because the sum of its binary digits is odd.

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

The square root of 242504531 is about 15572.5569833602. The cubic root of 242504531 is about 623.6007360880.

Adding to 242504531 its reverse (135405242), we get a palindrome (377909773).

The spelling of 242504531 in words is "two hundred forty-two million, five hundred four thousand, five hundred thirty-one".