31138732570 has 16 divisors (see below), whose sum is σ = 61145147808. Its totient is φ = 11323175440.

The previous prime is 31138732549. The next prime is 31138732577. The reversal of 31138732570 is 7523783113.

It is not an unprimeable number, because it can be changed into a prime (31138732577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141539584 + ... + 141539803.

It is an arithmetic number, because the mean of its divisors is an integer number (3821571738).

Almost surely, 2^31138732570 is an apocalyptic number.

31138732570 is a deficient number, since it is larger than the sum of its proper divisors (30006415238).

31138732570 is a wasteful number, since it uses less digits than its factorization.

31138732570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283079405.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 31138732570 in words is "thirty-one billion, one hundred thirty-eight million, seven hundred thirty-two thousand, five hundred seventy".