311311320131 has 32 divisors (see below), whose sum is σ = 368320867200. Its totient is φ = 257555690496.

The previous prime is 311311320097. The next prime is 311311320143. The reversal of 311311320131 is 131023113113.

It is not a de Polignac number, because 311311320131 - 2¹⁰ = 311311319107 is a prime.

It is a super-2 number, since 2×311311320131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311311320191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33067781 + ... + 33077193.

It is an arithmetic number, because the mean of its divisors is an integer number (11510027100).

Almost surely, 2^311311320131 is an apocalyptic number.

311311320131 is a deficient number, since it is larger than the sum of its proper divisors (57009547069).

311311320131 is a wasteful number, since it uses less digits than its factorization.

311311320131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10463.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 311311320131 its reverse (131023113113), we get a palindrome (442334433244).

The spelling of 311311320131 in words is "three hundred eleven billion, three hundred eleven million, three hundred twenty thousand, one hundred thirty-one".