31313440732 has 24 divisors (see below), whose sum is σ = 65923034240. Its totient is φ = 12713727600.

The previous prime is 31313440703. The next prime is 31313440777. The reversal of 31313440732 is 23704431313.

It is a junction number, because it is equal to n+sod(n) for n = 31313440694 and 31313440703.

It is a congruent number.

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, 29429394 + ... + 29430457.

Almost surely, 2^31313440732 is an apocalyptic number.

It is an amenable number.

31313440732 is an abundant number, since it is smaller than the sum of its proper divisors (34609593508).

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

31313440732 is a wasteful number, since it uses less digits than its factorization.

31313440732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58859881 (or 58859879 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 31.

The spelling of 31313440732 in words is "thirty-one billion, three hundred thirteen million, four hundred forty thousand, seven hundred thirty-two".