31039942631 has 2 divisors, whose sum is σ = 31039942632. Its totient is φ = 31039942630.

The previous prime is 31039942627. The next prime is 31039942651. The reversal of 31039942631 is 13624993013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31039942631 - 2² = 31039942627 is a prime.

It is a super-2 number, since 2×31039942631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31039942651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15519971315 + 15519971316.

It is an arithmetic number, because the mean of its divisors is an integer number (15519971316).

Almost surely, 2^31039942631 is an apocalyptic number.

31039942631 is a deficient number, since it is larger than the sum of its proper divisors (1).

31039942631 is an equidigital number, since it uses as much as digits as its factorization.

31039942631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 41.

The spelling of 31039942631 in words is "thirty-one billion, thirty-nine million, nine hundred forty-two thousand, six hundred thirty-one".