31313233302313 has 4 divisors (see below), whose sum is σ = 32392999967940. Its totient is φ = 30233466636688.

The previous prime is 31313233302277. The next prime is 31313233302317. The reversal of 31313233302313 is 31320333231313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20451812327424 + 10861420974889 = 4522368^2 + 3295667^2 .

It is a cyclic number.

It is not a de Polignac number, because 31313233302313 - 2²⁵ = 31313199747881 is a prime.

It is a super-2 number, since 2×31313233302313² (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 (31313233302317) 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, 539883332770 + ... + 539883332827.

It is an arithmetic number, because the mean of its divisors is an integer number (8098249991985).

Almost surely, 2^{31313233302313} is an apocalyptic number.

It is an amenable number.

31313233302313 is a deficient number, since it is larger than the sum of its proper divisors (1079766665627).

31313233302313 is a wasteful number, since it uses less digits than its factorization.

31313233302313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079766665626.

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

Adding to 31313233302313 its reverse (31320333231313), we get a palindrome (62633566533626).

The spelling of 31313233302313 in words is "thirty-one trillion, three hundred thirteen billion, two hundred thirty-three million, three hundred two thousand, three hundred thirteen".