31313313012 has 24 divisors (see below), whose sum is σ = 73392046336. Its totient is φ = 10390963968.

The previous prime is 31313313007. The next prime is 31313313049. The reversal of 31313313012 is 21031331313.

It is a self number, because there is not a number n which added to its sum of digits gives 31313313012.

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, 5848093 + ... + 5853444.

Almost surely, 2^31313313012 is an apocalyptic number.

It is an amenable number.

31313313012 is an abundant number, since it is smaller than the sum of its proper divisors (42078733324).

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

31313313012 is a wasteful number, since it uses less digits than its factorization.

31313313012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11701767 (or 11701765 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 31313313012 its reverse (21031331313), we get a palindrome (52344644325).

The spelling of 31313313012 in words is "thirty-one billion, three hundred thirteen million, three hundred thirteen thousand, twelve".