31290509000 has 32 divisors (see below), whose sum is σ = 73219793400. Its totient is φ = 12516203200.

The previous prime is 31290508979. The next prime is 31290509053. The reversal of 31290509000 is 90509213.

It can be written as a sum of positive squares in 4 ways, for example, as 12919959556 + 18370549444 = 113666^2 + 135538^2 .

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, 15644255 + ... + 15646254.

Almost surely, 2^31290509000 is an apocalyptic number.

It is an amenable number.

31290509000 is an abundant number, since it is smaller than the sum of its proper divisors (41929284400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31290509000 is a wasteful number, since it uses less digits than its factorization.

31290509000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31290530 (or 31290516 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 29.

The spelling of 31290509000 in words is "thirty-one billion, two hundred ninety million, five hundred nine thousand".