318087225 has 81 divisors (see below), whose sum is σ = 604795399. Its totient is φ = 159801600.

The previous prime is 318087197. The next prime is 318087229. The reversal of 318087225 is 522780813.

The square root of 318087225 is 17835.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 314672121 + 3415104 = 17739^2 + 1848^2 .

It is not a de Polignac number, because 318087225 - 2⁵ = 318087193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 318087225.

It is not an unprimeable number, because it can be changed into a prime (318087229) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 7758205 + ... + 7758245.

Almost surely, 2^318087225 is an apocalyptic number.

318087225 is the 17835-th square number.

318087225 is the 8918-th centered octagonal number.

It is an amenable number.

318087225 is a deficient number, since it is larger than the sum of its proper divisors (286708174).

318087225 is a wasteful number, since it uses less digits than its factorization.

318087225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The cubic root of 318087225 is about 682.6248211907.

Multiplying 318087225 by its sum of digits (36), we get a square (11451140100 = 107010²).

The spelling of 318087225 in words is "three hundred eighteen million, eighty-seven thousand, two hundred twenty-five".