315005591 has 2 divisors, whose sum is σ = 315005592. Its totient is φ = 315005590.

The previous prime is 315005549. The next prime is 315005599. The reversal of 315005591 is 195500513.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315005591 - 2⁶ = 315005527 is a prime.

It is a super-2 number, since 2×315005591² = 198457044722518562, 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 (315005599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157502795 + 157502796.

It is an arithmetic number, because the mean of its divisors is an integer number (157502796).

Almost surely, 2^315005591 is an apocalyptic number.

315005591 is a deficient number, since it is larger than the sum of its proper divisors (1).

315005591 is an equidigital number, since it uses as much as digits as its factorization.

315005591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3375, while the sum is 29.

The square root of 315005591 is about 17748.3968571812. The cubic root of 315005591 is about 680.4132371460.

The spelling of 315005591 in words is "three hundred fifteen million, five thousand, five hundred ninety-one".