31391611372 has 24 divisors (see below), whose sum is σ = 59964406992. Its totient is φ = 14260588800.

The previous prime is 31391611367. The next prime is 31391611403. The reversal of 31391611372 is 27311619313.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131553 + ... + 283000.

It is an arithmetic number, because the mean of its divisors is an integer number (2498516958).

Almost surely, 2^31391611372 is an apocalyptic number.

It is an amenable number.

31391611372 is a deficient number, since it is larger than the sum of its proper divisors (28572795620).

31391611372 is a wasteful number, since it uses less digits than its factorization.

31391611372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416289 (or 416287 counting only the distinct ones).

The product of its digits is 20412, while the sum is 37.

The spelling of 31391611372 in words is "thirty-one billion, three hundred ninety-one million, six hundred eleven thousand, three hundred seventy-two".