915970225 has 9 divisors (see below), whose sum is σ = 1135990753. Its totient is φ = 732655120.

The previous prime is 915970207. The next prime is 915970241. The reversal of 915970225 is 522079519.

The square root of 915970225 is 30265.

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

It can be written as a sum of positive squares in 4 ways, for example, as 338817649 + 577152576 = 18407^2 + 24024^2 .

It is a de Polignac number, because none of the positive numbers 2^k-915970225 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 148299 + ... + 154351.

Almost surely, 2^915970225 is an apocalyptic number.

915970225 is the 30265-th square number.

915970225 is the 15133-rd centered octagonal number.

It is an amenable number.

915970225 is a deficient number, since it is larger than the sum of its proper divisors (220020528).

915970225 is an frugal number, since it uses more digits than its factorization.

915970225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12116 (or 6058 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 40.

The cubic root of 915970225 is about 971.1667064542.

The spelling of 915970225 in words is "nine hundred fifteen million, nine hundred seventy thousand, two hundred twenty-five".