315232509 has 4 divisors (see below), whose sum is σ = 420310016. Its totient is φ = 210155004.

The previous prime is 315232487. The next prime is 315232529. The reversal of 315232509 is 905232513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 315232509 - 2⁷ = 315232381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315232529) 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, 52538749 + ... + 52538754.

It is an arithmetic number, because the mean of its divisors is an integer number (105077504).

Almost surely, 2^315232509 is an apocalyptic number.

It is an amenable number.

315232509 is a deficient number, since it is larger than the sum of its proper divisors (105077507).

315232509 is a wasteful number, since it uses less digits than its factorization.

315232509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105077506.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 315232509 is about 17754.7883400507. The cubic root of 315232509 is about 680.5765791692.

The spelling of 315232509 in words is "three hundred fifteen million, two hundred thirty-two thousand, five hundred nine".