2313313131256 has 8 divisors (see below), whose sum is σ = 4337462121120. Its totient is φ = 1156656565624.

The previous prime is 2313313131253. The next prime is 2313313131257. The reversal of 2313313131256 is 6521313133132.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2313313131253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144582070696 + ... + 144582070711.

It is an arithmetic number, because the mean of its divisors is an integer number (542182765140).

Almost surely, 2^{2313313131256} is an apocalyptic number.

It is an amenable number.

2313313131256 is a deficient number, since it is larger than the sum of its proper divisors (2024148989864).

2313313131256 is a wasteful number, since it uses less digits than its factorization.

2313313131256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289164141413 (or 289164141409 counting only the distinct ones).

The product of its digits is 29160, while the sum is 34.

Adding to 2313313131256 its reverse (6521313133132), we get a palindrome (8834626264388).

The spelling of 2313313131256 in words is "two trillion, three hundred thirteen billion, three hundred thirteen million, one hundred thirty-one thousand, two hundred fifty-six".