311231453423213 has 4 divisors (see below), whose sum is σ = 311687136371808. Its totient is φ = 310775770474620.

The previous prime is 311231453423207. The next prime is 311231453423257. The reversal of 311231453423213 is 312324354132113.

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 not a de Polignac number, because 311231453423213 - 2⁴⁰ = 310131941795437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311231453423413) 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, 227841473273 + ... + 227841474638.

It is an arithmetic number, because the mean of its divisors is an integer number (77921784092952).

Almost surely, 2^{311231453423213} is an apocalyptic number.

It is an amenable number.

311231453423213 is a deficient number, since it is larger than the sum of its proper divisors (455682948595).

311231453423213 is an equidigital number, since it uses as much as digits as its factorization.

311231453423213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455682948594.

The product of its digits is 155520, while the sum is 38.

The spelling of 311231453423213 in words is "three hundred eleven trillion, two hundred thirty-one billion, four hundred fifty-three million, four hundred twenty-three thousand, two hundred thirteen".