31313310312 has 32 divisors (see below), whose sum is σ = 78343433280. Its totient is φ = 10429749120.

The previous prime is 31313310311. The next prime is 31313310331. The reversal of 31313310312 is 21301331313.

It is not an unprimeable number, because it can be changed into a prime (31313310311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469389 + ... + 531932.

It is an arithmetic number, because the mean of its divisors is an integer number (2448232290).

Almost surely, 2^31313310312 is an apocalyptic number.

It is an amenable number.

31313310312 is an abundant number, since it is smaller than the sum of its proper divisors (47030122968).

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

31313310312 is a wasteful number, since it uses less digits than its factorization.

31313310312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002633 (or 1002629 counting only the distinct ones).

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

Adding to 31313310312 its reverse (21301331313), we get a palindrome (52614641625).

The spelling of 31313310312 in words is "thirty-one billion, three hundred thirteen million, three hundred ten thousand, three hundred twelve".