225570172 has 6 divisors (see below), whose sum is σ = 394747808. Its totient is φ = 112785084.

The previous prime is 225570139. The next prime is 225570181. The reversal of 225570172 is 271075522.

It is a super-2 number, since 2×225570172² = 101763804992219168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28196268 + ... + 28196275.

Almost surely, 2^225570172 is an apocalyptic number.

It is an amenable number.

225570172 is a deficient number, since it is larger than the sum of its proper divisors (169177636).

225570172 is a wasteful number, since it uses less digits than its factorization.

225570172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56392547 (or 56392545 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 225570172 is about 15018.9937079686. The cubic root of 225570172 is about 608.7335293440.

It can be divided in two parts, 2255 and 70172, that added together give a palindrome (72427).

The spelling of 225570172 in words is "two hundred twenty-five million, five hundred seventy thousand, one hundred seventy-two".