31313303312 has 80 divisors (see below), whose sum is σ = 63689256960. Its totient is φ = 14901853824.

The previous prime is 31313303299. The next prime is 31313303321. The reversal of 31313303312 is 21330331313.

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, 3976403 + ... + 3984269.

It is an arithmetic number, because the mean of its divisors is an integer number (796115712).

Almost surely, 2^31313303312 is an apocalyptic number.

It is an amenable number.

31313303312 is an abundant number, since it is smaller than the sum of its proper divisors (32375953648).

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

31313303312 is a wasteful number, since it uses less digits than its factorization.

31313303312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8068 (or 8062 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 23.

Adding to 31313303312 its reverse (21330331313), we get a palindrome (52643634625).

The spelling of 31313303312 in words is "thirty-one billion, three hundred thirteen million, three hundred three thousand, three hundred twelve".