31317926540 has 48 divisors (see below), whose sum is σ = 68682055680. Its totient is φ = 11972917440.

The previous prime is 31317926533. The next prime is 31317926567. The reversal of 31317926540 is 4562971313.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 561725 + ... + 614955.

It is an arithmetic number, because the mean of its divisors is an integer number (1430876160).

Almost surely, 2^31317926540 is an apocalyptic number.

It is an amenable number.

31317926540 is an abundant number, since it is smaller than the sum of its proper divisors (37364129140).

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

31317926540 is a wasteful number, since it uses less digits than its factorization.

31317926540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54542 (or 54540 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 41.

The spelling of 31317926540 in words is "thirty-one billion, three hundred seventeen million, nine hundred twenty-six thousand, five hundred forty".