315261725 has 18 divisors (see below), whose sum is σ = 397555470. Its totient is φ = 248001600.

The previous prime is 315261707. The next prime is 315261731. The reversal of 315261725 is 527162513.

It can be written as a sum of positive squares in 9 ways, for example, as 172291876 + 142969849 = 13126^2 + 11957^2 .

It is a de Polignac number, because none of the positive numbers 2^k-315261725 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 315261691 and 315261700.

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 91331 + ... + 94719.

It is an arithmetic number, because the mean of its divisors is an integer number (22086415).

Almost surely, 2^315261725 is an apocalyptic number.

It is an amenable number.

315261725 is a deficient number, since it is larger than the sum of its proper divisors (82293745).

315261725 is an equidigital number, since it uses as much as digits as its factorization.

315261725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521 (or 3455 counting only the distinct ones).

The product of its digits is 12600, while the sum is 32.

The square root of 315261725 is about 17755.6110849500. The cubic root of 315261725 is about 680.5976039795.

The spelling of 315261725 in words is "three hundred fifteen million, two hundred sixty-one thousand, seven hundred twenty-five".