315442531 has 4 divisors (see below), whose sum is σ = 333997992. Its totient is φ = 296887072.

The previous prime is 315442511. The next prime is 315442537. The reversal of 315442531 is 135244513.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 315442531 - 2²⁵ = 281888099 is a prime.

It is a super-2 number, since 2×315442531² = 199007980727371922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 315442531.

It is not an unprimeable number, because it can be changed into a prime (315442537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9277705 + ... + 9277738.

It is an arithmetic number, because the mean of its divisors is an integer number (83499498).

Almost surely, 2^315442531 is an apocalyptic number.

315442531 is a deficient number, since it is larger than the sum of its proper divisors (18555461).

315442531 is a wasteful number, since it uses less digits than its factorization.

315442531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18555460.

The product of its digits is 7200, while the sum is 28.

The square root of 315442531 is about 17760.7018723923. The cubic root of 315442531 is about 680.7276891367.

The spelling of 315442531 in words is "three hundred fifteen million, four hundred forty-two thousand, five hundred thirty-one".