31139837912 has 16 divisors (see below), whose sum is σ = 58404628800. Its totient is φ = 15565270240.

The previous prime is 31139837887. The next prime is 31139837933. The reversal of 31139837912 is 21973893113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552539 + ... + 606282.

It is an arithmetic number, because the mean of its divisors is an integer number (3650289300).

Almost surely, 2^31139837912 is an apocalyptic number.

It is an amenable number.

31139837912 is a deficient number, since it is larger than the sum of its proper divisors (27264790888).

31139837912 is a wasteful number, since it uses less digits than its factorization.

31139837912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162186 (or 1162182 counting only the distinct ones).

The product of its digits is 244944, while the sum is 47.

The spelling of 31139837912 in words is "thirty-one billion, one hundred thirty-nine million, eight hundred thirty-seven thousand, nine hundred twelve".