225181228 has 12 divisors (see below), whose sum is σ = 394332400. Its totient is φ = 112514832.

The previous prime is 225181213. The next prime is 225181321. The reversal of 225181228 is 822181522.

It is a self number, because there is not a number n which added to its sum of digits gives 225181228.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11976 + ... + 24367.

Almost surely, 2^225181228 is an apocalyptic number.

It is an amenable number.

225181228 is a deficient number, since it is larger than the sum of its proper divisors (169151172).

225181228 is a wasteful number, since it uses less digits than its factorization.

225181228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37896 (or 37894 counting only the distinct ones).

The product of its digits is 5120, while the sum is 31.

The square root of 225181228 is about 15006.0397173938. The cubic root of 225181228 is about 608.3834542970.

The spelling of 225181228 in words is "two hundred twenty-five million, one hundred eighty-one thousand, two hundred twenty-eight".