311320152521231 has 24 divisors (see below), whose sum is σ = 367674412925952. Its totient is φ = 258215100966000.

The previous prime is 311320152521227. The next prime is 311320152521243. The reversal of 311320152521231 is 132125251023113.

It is not a de Polignac number, because 311320152521231 - 2² = 311320152521227 is a prime.

It is a super-2 number, since 2×311320152521231² (a number of 30 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 (311320152551231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74319626 + ... + 78396728.

It is an arithmetic number, because the mean of its divisors is an integer number (15319767205248).

Almost surely, 2^{311320152521231} is an apocalyptic number.

311320152521231 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

311320152521231 is a deficient number, since it is larger than the sum of its proper divisors (56354260404721).

311320152521231 is a wasteful number, since it uses less digits than its factorization.

311320152521231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4088523 (or 4088492 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 311320152521231 in words is "three hundred eleven trillion, three hundred twenty billion, one hundred fifty-two million, five hundred twenty-one thousand, two hundred thirty-one".