225157172 has 6 divisors (see below), whose sum is σ = 394025058. Its totient is φ = 112578584.

The previous prime is 225157169. The next prime is 225157181. The reversal of 225157172 is 271751522.

It can be written as a sum of positive squares in only one way, i.e., 212168356 + 12988816 = 14566^2 + 3604^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28144643 + ... + 28144650.

It is an arithmetic number, because the mean of its divisors is an integer number (65670843).

Almost surely, 2^225157172 is an apocalyptic number.

It is an amenable number.

225157172 is a deficient number, since it is larger than the sum of its proper divisors (168867886).

225157172 is a wasteful number, since it uses less digits than its factorization.

225157172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56289297 (or 56289295 counting only the distinct ones).

The product of its digits is 9800, while the sum is 32.

The square root of 225157172 is about 15005.2381520588. The cubic root of 225157172 is about 608.3617890903.

The spelling of 225157172 in words is "two hundred twenty-five million, one hundred fifty-seven thousand, one hundred seventy-two".