31513613156 has 12 divisors (see below), whose sum is σ = 55211427180. Its totient is φ = 15738919680.

The previous prime is 31513613147. The next prime is 31513613171. The reversal of 31513613156 is 65131631513.

It can be written as a sum of positive squares in 2 ways, for example, as 6617822500 + 24895790656 = 81350^2 + 157784^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4467761 + ... + 4474808.

It is an arithmetic number, because the mean of its divisors is an integer number (4600952265).

Almost surely, 2^31513613156 is an apocalyptic number.

It is an amenable number.

31513613156 is a deficient number, since it is larger than the sum of its proper divisors (23697814024).

31513613156 is a wasteful number, since it uses less digits than its factorization.

31513613156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8943454 (or 8943452 counting only the distinct ones).

The product of its digits is 24300, while the sum is 35.

The spelling of 31513613156 in words is "thirty-one billion, five hundred thirteen million, six hundred thirteen thousand, one hundred fifty-six".