315513531 has 6 divisors (see below), whose sum is σ = 455741780. Its totient is φ = 210342348.

The previous prime is 315513529. The next prime is 315513547. The reversal of 315513531 is 135315513.

It is not a de Polignac number, because 315513531 - 2¹ = 315513529 is a prime.

It is a super-2 number, since 2×315513531² = 199097576488175922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 315513495 and 315513504.

It is not an unprimeable number, because it can be changed into a prime (315513511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17528521 + ... + 17528538.

Almost surely, 2^315513531 is an apocalyptic number.

315513531 is a deficient number, since it is larger than the sum of its proper divisors (140228249).

315513531 is a wasteful number, since it uses less digits than its factorization.

315513531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35057065 (or 35057062 counting only the distinct ones).

The product of its digits is 3375, while the sum is 27.

The square root of 315513531 is about 17762.7005548143. The cubic root of 315513531 is about 680.7787581751.

The spelling of 315513531 in words is "three hundred fifteen million, five hundred thirteen thousand, five hundred thirty-one".