531315225 has 36 divisors (see below), whose sum is σ = 1087597056. Its totient is φ = 242886240.

The previous prime is 531315217. The next prime is 531315299. The reversal of 531315225 is 522513135.

It is a happy number.

531315225 is a `hidden beast` number, since 5 + 3 + 131 + 522 + 5 = 666.

It is not a de Polignac number, because 531315225 - 2³ = 531315217 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 167097 + ... + 170246.

Almost surely, 2^531315225 is an apocalyptic number.

It is an amenable number.

531315225 is an abundant number, since it is smaller than the sum of its proper divisors (556281831).

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

531315225 is a wasteful number, since it uses less digits than its factorization.

531315225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337366 (or 337358 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 531315225 is about 23050.2760287160. The cubic root of 531315225 is about 809.9360946382.

The spelling of 531315225 in words is "five hundred thirty-one million, three hundred fifteen thousand, two hundred twenty-five".