311320302031931 has 2 divisors, whose sum is σ = 311320302031932. Its totient is φ = 311320302031930.

The previous prime is 311320302031877. The next prime is 311320302032021. The reversal of 311320302031931 is 139130203023113.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311320302031931 is a prime.

It is a super-2 number, since 2×311320302031931² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (311320302051931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155660151015965 + 155660151015966.

It is an arithmetic number, because the mean of its divisors is an integer number (155660151015966).

Almost surely, 2^{311320302031931} is an apocalyptic number.

311320302031931 is a deficient number, since it is larger than the sum of its proper divisors (1).

311320302031931 is an equidigital number, since it uses as much as digits as its factorization.

311320302031931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 32.

The spelling of 311320302031931 in words is "three hundred eleven trillion, three hundred twenty billion, three hundred two million, thirty-one thousand, nine hundred thirty-one".