315338531 has 4 divisors (see below), whose sum is σ = 323861232. Its totient is φ = 306815832.

The previous prime is 315338483. The next prime is 315338563. The reversal of 315338531 is 135833513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135833513 = 1297 ⋅104729.

It is a cyclic number.

It is not a de Polignac number, because 315338531 - 2⁶ = 315338467 is a prime.

It is a super-2 number, since 2×315338531² = 198876778266475922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315338731) 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, 4261295 + ... + 4261368.

It is an arithmetic number, because the mean of its divisors is an integer number (80965308).

Almost surely, 2^315338531 is an apocalyptic number.

315338531 is a deficient number, since it is larger than the sum of its proper divisors (8522701).

315338531 is an equidigital number, since it uses as much as digits as its factorization.

315338531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8522700.

The product of its digits is 16200, while the sum is 32.

The square root of 315338531 is about 17757.7738188096. The cubic root of 315338531 is about 680.6528699494.

The spelling of 315338531 in words is "three hundred fifteen million, three hundred thirty-eight thousand, five hundred thirty-one".