242618531 has 2 divisors, whose sum is σ = 242618532. Its totient is φ = 242618530.

The previous prime is 242618527. The next prime is 242618557. The reversal of 242618531 is 135816242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242618531 - 2² = 242618527 is a prime.

It is a super-2 number, since 2×242618531² = 117727503169195922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (242618501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121309265 + 121309266.

It is an arithmetic number, because the mean of its divisors is an integer number (121309266).

Almost surely, 2^242618531 is an apocalyptic number.

242618531 is a deficient number, since it is larger than the sum of its proper divisors (1).

242618531 is an equidigital number, since it uses as much as digits as its factorization.

242618531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The square root of 242618531 is about 15576.2168385009. The cubic root of 242618531 is about 623.6984378324.

The spelling of 242618531 in words is "two hundred forty-two million, six hundred eighteen thousand, five hundred thirty-one".