315557442 has 54 divisors (see below), whose sum is σ = 705783897. Its totient is φ = 101894832.

The previous prime is 315557413. The next prime is 315557477. The reversal of 315557442 is 244755513.

315557442 is a `hidden beast` number, since 31 + 55 + 574 + 4 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 299324601 + 16232841 = 17301^2 + 4029^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=12561.

It is a junction number, because it is equal to n+sod(n) for n = 315557397 and 315557406.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3994359 + ... + 3994437.

Almost surely, 2^315557442 is an apocalyptic number.

315557442 is an abundant number, since it is smaller than the sum of its proper divisors (390226455).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

315557442 is an equidigital number, since it uses as much as digits as its factorization.

315557442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 137 counting only the distinct ones).

The product of its digits is 84000, while the sum is 36.

The square root of 315557442 is about 17763.9365569684. The cubic root of 315557442 is about 680.8103387429.

The spelling of 315557442 in words is "three hundred fifteen million, five hundred fifty-seven thousand, four hundred forty-two".