31530215504 has 20 divisors (see below), whose sum is σ = 61107077364. Its totient is φ = 15760647168.

The previous prime is 31530215489. The next prime is 31530215533. The reversal of 31530215504 is 40551203513.

It can be written as a sum of positive squares in 2 ways, for example, as 16682305600 + 14847909904 = 129160^2 + 121852^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220097 + ... + 333920.

Almost surely, 2^31530215504 is an apocalyptic number.

It is an amenable number.

31530215504 is a deficient number, since it is larger than the sum of its proper divisors (29576861860).

31530215504 is a wasteful number, since it uses less digits than its factorization.

31530215504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557582 (or 557576 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The spelling of 31530215504 in words is "thirty-one billion, five hundred thirty million, two hundred fifteen thousand, five hundred four".