31352378631 has 16 divisors (see below), whose sum is σ = 49852230144. Its totient is φ = 17136703584.

The previous prime is 31352378627. The next prime is 31352378633. The reversal of 31352378631 is 13687325313.

It is not a de Polignac number, because 31352378631 - 2² = 31352378627 is a prime.

It is a super-2 number, since 2×31352378631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31352378633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32455396 + ... + 32456361.

It is an arithmetic number, because the mean of its divisors is an integer number (3115764384).

Almost surely, 2^31352378631 is an apocalyptic number.

31352378631 is a deficient number, since it is larger than the sum of its proper divisors (18499851513).

31352378631 is a wasteful number, since it uses less digits than its factorization.

31352378631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64911790.

The product of its digits is 272160, while the sum is 42.

The spelling of 31352378631 in words is "thirty-one billion, three hundred fifty-two million, three hundred seventy-eight thousand, six hundred thirty-one".