315263531 has 4 divisors (see below), whose sum is σ = 343923864. Its totient is φ = 286603200.

The previous prime is 315263527. The next prime is 315263549. The reversal of 315263531 is 135362513.

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 315263531 - 2² = 315263527 is a prime.

It is a super-2 number, since 2×315263531² = 198782187957175922, 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 = 315263494 and 315263503.

It is not an unprimeable number, because it can be changed into a prime (315263131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14330150 + ... + 14330171.

It is an arithmetic number, because the mean of its divisors is an integer number (85980966).

Almost surely, 2^315263531 is an apocalyptic number.

315263531 is a deficient number, since it is larger than the sum of its proper divisors (28660333).

315263531 is a wasteful number, since it uses less digits than its factorization.

315263531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28660332.

The product of its digits is 8100, while the sum is 29.

The square root of 315263531 is about 17755.6619420398. The cubic root of 315263531 is about 680.5989035948.

The spelling of 315263531 in words is "three hundred fifteen million, two hundred sixty-three thousand, five hundred thirty-one".