311853774931 has 2 divisors, whose sum is σ = 311853774932. Its totient is φ = 311853774930.

The previous prime is 311853774923. The next prime is 311853774937. The reversal of 311853774931 is 139477358113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311853774931 - 2³ = 311853774923 is a prime.

It is a super-2 number, since 2×311853774931² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (311853774937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155926887465 + 155926887466.

It is an arithmetic number, because the mean of its divisors is an integer number (155926887466).

Almost surely, 2^311853774931 is an apocalyptic number.

311853774931 is a deficient number, since it is larger than the sum of its proper divisors (1).

311853774931 is an equidigital number, since it uses as much as digits as its factorization.

311853774931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 52.

The spelling of 311853774931 in words is "three hundred eleven billion, eight hundred fifty-three million, seven hundred seventy-four thousand, nine hundred thirty-one".