315591137 has 6 divisors (see below), whose sum is σ = 326849718. Its totient is φ = 304707872.

The previous prime is 315591131. The next prime is 315591139. The reversal of 315591137 is 731195513.

It can be written as a sum of positive squares in 3 ways, for example, as 142826401 + 172764736 = 11951^2 + 13144^2 .

It is a de Polignac number, because none of the positive numbers 2^k-315591137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 315591097 and 315591106.

It is not an unprimeable number, because it can be changed into a prime (315591131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 186788 + ... + 188469.

It is an arithmetic number, because the mean of its divisors is an integer number (54474953).

Almost surely, 2^315591137 is an apocalyptic number.

It is an amenable number.

315591137 is a deficient number, since it is larger than the sum of its proper divisors (11258581).

315591137 is an equidigital number, since it uses as much as digits as its factorization.

315591137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375315 (or 375286 counting only the distinct ones).

The product of its digits is 14175, while the sum is 35.

The square root of 315591137 is about 17764.8849419297. The cubic root of 315591137 is about 680.8345700290.

The spelling of 315591137 in words is "three hundred fifteen million, five hundred ninety-one thousand, one hundred thirty-seven".