240631631 has 2 divisors, whose sum is σ = 240631632. Its totient is φ = 240631630.

The previous prime is 240631627. The next prime is 240631649. The reversal of 240631631 is 136136042.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 240631631 - 2² = 240631627 is a prime.

It is a super-2 number, since 2×240631631² = 115807163675440322, which contains 22 as substring.

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 240631631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240631621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120315815 + 120315816.

It is an arithmetic number, because the mean of its divisors is an integer number (120315816).

Almost surely, 2^240631631 is an apocalyptic number.

240631631 is a deficient number, since it is larger than the sum of its proper divisors (1).

240631631 is an equidigital number, since it uses as much as digits as its factorization.

240631631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 240631631 is about 15512.3057924991. The cubic root of 240631631 is about 621.9911970646.

Adding to 240631631 its reverse (136136042), we get a palindrome (376767673).

The spelling of 240631631 in words is "two hundred forty million, six hundred thirty-one thousand, six hundred thirty-one".