315243225 has 48 divisors (see below), whose sum is σ = 631775040. Its totient is φ = 152841600.

The previous prime is 315243217. The next prime is 315243289. The reversal of 315243225 is 522342513.

It is a happy number.

315243225 is a `hidden beast` number, since 315 + 24 + 322 + 5 = 666.

It is not a de Polignac number, because 315243225 - 2³ = 315243217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13804 + ... + 28653.

It is an arithmetic number, because the mean of its divisors is an integer number (13161980).

Almost surely, 2^315243225 is an apocalyptic number.

It is an amenable number.

315243225 is an abundant number, since it is smaller than the sum of its proper divisors (316531815).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

315243225 is a wasteful number, since it uses less digits than its factorization.

315243225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42487 (or 42476 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 315243225 is about 17755.0901152317. The cubic root of 315243225 is about 680.5842909119.

Adding to 315243225 its reverse (522342513), we get a palindrome (837585738).

The spelling of 315243225 in words is "three hundred fifteen million, two hundred forty-three thousand, two hundred twenty-five".