315025531 has 2 divisors, whose sum is σ = 315025532. Its totient is φ = 315025530.

The previous prime is 315025523. The next prime is 315025547. The reversal of 315025531 is 135520513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315025531 - 2³ = 315025523 is a prime.

It is a super-2 number, since 2×315025531² = 198482170363663922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 315025496 and 315025505.

It is not a weakly prime, because it can be changed into another prime (315023531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157512765 + 157512766.

It is an arithmetic number, because the mean of its divisors is an integer number (157512766).

Almost surely, 2^315025531 is an apocalyptic number.

315025531 is a deficient number, since it is larger than the sum of its proper divisors (1).

315025531 is an equidigital number, since it uses as much as digits as its factorization.

315025531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 315025531 is about 17748.9585891680. The cubic root of 315025531 is about 680.4275936676.

The spelling of 315025531 in words is "three hundred fifteen million, twenty-five thousand, five hundred thirty-one".