31331232330313 has 24 divisors (see below), whose sum is σ = 33855825902400. Its totient is φ = 28980663575808.

The previous prime is 31331232330247. The next prime is 31331232330319. The reversal of 31331232330313 is 31303323213313.

It is a de Polignac number, because none of the positive numbers 2^k-31331232330313 is a prime.

It is a super-2 number, since 2×31331232330313² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31331232330319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63987223 + ... + 64475011.

It is an arithmetic number, because the mean of its divisors is an integer number (1410659412600).

Almost surely, 2^{31331232330313} is an apocalyptic number.

It is an amenable number.

31331232330313 is a deficient number, since it is larger than the sum of its proper divisors (2524593572087).

31331232330313 is a wasteful number, since it uses less digits than its factorization.

31331232330313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491649 (or 491632 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 31.

Adding to 31331232330313 its reverse (31303323213313), we get a palindrome (62634555543626).

The spelling of 31331232330313 in words is "thirty-one trillion, three hundred thirty-one billion, two hundred thirty-two million, three hundred thirty thousand, three hundred thirteen".