31137266138 has 24 divisors (see below), whose sum is σ = 51375615060. Its totient is φ = 14142902400.

The previous prime is 31137266057. The next prime is 31137266143. The reversal of 31137266138 is 83166273113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27856611409 + 3280654729 = 166903^2 + 57277^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31137266095 and 31137266104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 287618 + ... + 380786.

Almost surely, 2^31137266138 is an apocalyptic number.

31137266138 is a deficient number, since it is larger than the sum of its proper divisors (20238348922).

31137266138 is a wasteful number, since it uses less digits than its factorization.

31137266138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94574 (or 94563 counting only the distinct ones).

The product of its digits is 108864, while the sum is 41.

The spelling of 31137266138 in words is "thirty-one billion, one hundred thirty-seven million, two hundred sixty-six thousand, one hundred thirty-eight".