31310232220313 has 4 divisors (see below), whose sum is σ = 31312261809360. Its totient is φ = 31308202631268.

The previous prime is 31310232220307. The next prime is 31310232220343. The reversal of 31310232220313 is 31302223201313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31310232220313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31310232220343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1014771383 + ... + 1014802236.

It is an arithmetic number, because the mean of its divisors is an integer number (7828065452340).

Almost surely, 2^{31310232220313} is an apocalyptic number.

It is an amenable number.

31310232220313 is a deficient number, since it is larger than the sum of its proper divisors (2029589047).

31310232220313 is a wasteful number, since it uses less digits than its factorization.

31310232220313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029589046.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 31310232220313 its reverse (31302223201313), we get a palindrome (62612455421626).

The spelling of 31310232220313 in words is "thirty-one trillion, three hundred ten billion, two hundred thirty-two million, two hundred twenty thousand, three hundred thirteen".