31331310320312 has 64 divisors (see below), whose sum is σ = 65478041604000. Its totient is φ = 13967627821056.

The previous prime is 31331310320311. The next prime is 31331310320461. The reversal of 31331310320312 is 21302301313313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31331310320311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75496514 + ... + 75910382.

Almost surely, 2^{31331310320312} is an apocalyptic number.

It is an amenable number.

31331310320312 is an abundant number, since it is smaller than the sum of its proper divisors (34146731283688).

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

31331310320312 is a wasteful number, since it uses less digits than its factorization.

31331310320312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443208 (or 443204 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 31331310320312 its reverse (21302301313313), we get a palindrome (52633611633625).

The spelling of 31331310320312 in words is "thirty-one trillion, three hundred thirty-one billion, three hundred ten million, three hundred twenty thousand, three hundred twelve".