311344038013 has 4 divisors (see below), whose sum is σ = 312267907900. Its totient is φ = 310420168128.

The previous prime is 311344038007. The next prime is 311344038017. The reversal of 311344038013 is 310830443113.

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 29300195929 + 282043842084 = 171173^2 + 531078^2 .

It is a cyclic number.

It is not a de Polignac number, because 311344038013 - 2⁵ = 311344037981 is a prime.

It is a super-2 number, since 2×311344038013² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311344038017) 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, 461934438 + ... + 461935111.

It is an arithmetic number, because the mean of its divisors is an integer number (78066976975).

Almost surely, 2^311344038013 is an apocalyptic number.

It is an amenable number.

311344038013 is a deficient number, since it is larger than the sum of its proper divisors (923869887).

311344038013 is an equidigital number, since it uses as much as digits as its factorization.

311344038013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923869886.

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 311344038013 in words is "three hundred eleven billion, three hundred forty-four million, thirty-eight thousand, thirteen".