225187172 has 24 divisors (see below), whose sum is σ = 451670016. Its totient is φ = 96231168.

The previous prime is 225187169. The next prime is 225187213. The reversal of 225187172 is 271781522.

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 in 7 ways as a sum of consecutive naturals, for example, 1508 + ... + 21275.

It is an arithmetic number, because the mean of its divisors is an integer number (18819584).

Almost surely, 2^225187172 is an apocalyptic number.

It is an amenable number.

225187172 is an abundant number, since it is smaller than the sum of its proper divisors (226482844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225187172 is a wasteful number, since it uses less digits than its factorization.

225187172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23147 (or 23145 counting only the distinct ones).

The product of its digits is 15680, while the sum is 35.

The square root of 225187172 is about 15006.2377696743. The cubic root of 225187172 is about 608.3888073179.

The spelling of 225187172 in words is "two hundred twenty-five million, one hundred eighty-seven thousand, one hundred seventy-two".