315766631 has 2 divisors, whose sum is σ = 315766632. Its totient is φ = 315766630.

The previous prime is 315766613. The next prime is 315766637. The reversal of 315766631 is 136667513.

Together with previous prime (315766613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315766631 - 2¹⁸ = 315504487 is a prime.

It is a super-2 number, since 2×315766631² = 199417130506180322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315766637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157883315 + 157883316.

It is an arithmetic number, because the mean of its divisors is an integer number (157883316).

Almost surely, 2^315766631 is an apocalyptic number.

315766631 is a deficient number, since it is larger than the sum of its proper divisors (1).

315766631 is an equidigital number, since it uses as much as digits as its factorization.

315766631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 38.

The square root of 315766631 is about 17769.8236063277. The cubic root of 315766631 is about 680.9607461976.

The spelling of 315766631 in words is "three hundred fifteen million, seven hundred sixty-six thousand, six hundred thirty-one".