225173187 has 12 divisors (see below), whose sum is σ = 325472784. Its totient is φ = 150012720.

The previous prime is 225173183. The next prime is 225173209. The reversal of 225173187 is 781371522.

It is not a de Polignac number, because 225173187 - 2² = 225173183 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225173183) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6762 + ... + 22272.

It is an arithmetic number, because the mean of its divisors is an integer number (27122732).

Almost surely, 2^225173187 is an apocalyptic number.

225173187 is a deficient number, since it is larger than the sum of its proper divisors (100299597).

225173187 is a wasteful number, since it uses less digits than its factorization.

225173187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17130 (or 17127 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 225173187 is about 15005.7717895482. The cubic root of 225173187 is about 608.3762126194.

The spelling of 225173187 in words is "two hundred twenty-five million, one hundred seventy-three thousand, one hundred eighty-seven".