312788856358931 has 2 divisors, whose sum is σ = 312788856358932. Its totient is φ = 312788856358930.

The previous prime is 312788856358907. The next prime is 312788856358963. The reversal of 312788856358931 is 139853658887213.

It is a weak prime.

It is an emirp because it is prime and its reverse (139853658887213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312788856358931 is a prime.

It is a super-2 number, since 2×312788856358931² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (312788856351931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156394428179465 + 156394428179466.

It is an arithmetic number, because the mean of its divisors is an integer number (156394428179466).

Almost surely, 2^{312788856358931} is an apocalyptic number.

312788856358931 is a deficient number, since it is larger than the sum of its proper divisors (1).

312788856358931 is an equidigital number, since it uses as much as digits as its factorization.

312788856358931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2090188800, while the sum is 77.

The spelling of 312788856358931 in words is "three hundred twelve trillion, seven hundred eighty-eight billion, eight hundred fifty-six million, three hundred fifty-eight thousand, nine hundred thirty-one".