315591131 has 2 divisors, whose sum is σ = 315591132. Its totient is φ = 315591130.

The previous prime is 315591113. The next prime is 315591139. The reversal of 315591131 is 131195513.

Together with previous prime (315591113) 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 315591131 - 2¹⁴ = 315574747 is a prime.

It is a super-2 number, since 2×315591131² = 199195523931718322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 315591094 and 315591103.

It is not a weakly prime, because it can be changed into another prime (315591139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157795565 + 157795566.

It is an arithmetic number, because the mean of its divisors is an integer number (157795566).

Almost surely, 2^315591131 is an apocalyptic number.

315591131 is a deficient number, since it is larger than the sum of its proper divisors (1).

315591131 is an equidigital number, since it uses as much as digits as its factorization.

315591131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2025, while the sum is 29.

The square root of 315591131 is about 17764.8847730572. The cubic root of 315591131 is about 680.8345657143.

The spelling of 315591131 in words is "three hundred fifteen million, five hundred ninety-one thousand, one hundred thirty-one".