312311113213 has 4 divisors (see below), whose sum is σ = 340703032608. Its totient is φ = 283919193820.

The previous prime is 312311113207. The next prime is 312311113217.

312311113213 is nontrivially palindromic in base 10.

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-312311113213 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 (312311113217) 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, 14195959681 + ... + 14195959702.

It is an arithmetic number, because the mean of its divisors is an integer number (85175758152).

Almost surely, 2^312311113213 is an apocalyptic number.

It is an amenable number.

312311113213 is a deficient number, since it is larger than the sum of its proper divisors (28391919395).

312311113213 is a wasteful number, since it uses less digits than its factorization.

312311113213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28391919394.

The product of its digits is 324, while the sum is 22.

It can be divided in two parts, 312311 and 113213, that added together give a palindrome (425524).

The spelling of 312311113213 in words is "three hundred twelve billion, three hundred eleven million, one hundred thirteen thousand, two hundred thirteen".