31520131010 has 16 divisors (see below), whose sum is σ = 56738300472. Its totient is φ = 12607593600.

The previous prime is 31520131007. The next prime is 31520131033. The reversal of 31520131010 is 1013102513.

It can be written as a sum of positive squares in 4 ways, for example, as 26722767841 + 4797363169 = 163471^2 + 69263^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31520131010.

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, 421880 + ... + 490940.

Almost surely, 2^31520131010 is an apocalyptic number.

31520131010 is a deficient number, since it is larger than the sum of its proper divisors (25218169462).

31520131010 is a wasteful number, since it uses less digits than its factorization.

31520131010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114709.

The product of its (nonzero) digits is 90, while the sum is 17.

Adding to 31520131010 its reverse (1013102513), we get a palindrome (32533233523).

The spelling of 31520131010 in words is "thirty-one billion, five hundred twenty million, one hundred thirty-one thousand, ten".