225240172 has 12 divisors (see below), whose sum is σ = 406885696. Its totient is φ = 108987120.

The previous prime is 225240167. The next prime is 225240199. The reversal of 225240172 is 271042522.

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, 908103 + ... + 908350.

Almost surely, 2^225240172 is an apocalyptic number.

It is an amenable number.

225240172 is a deficient number, since it is larger than the sum of its proper divisors (181645524).

225240172 is a wasteful number, since it uses less digits than its factorization.

225240172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816488 (or 1816486 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 225240172 is about 15008.0035980806. The cubic root of 225240172 is about 608.4365336561.

Adding to 225240172 its reverse (271042522), we get a palindrome (496282694).

It can be divided in two parts, 2252 and 40172, that added together give a palindrome (42424).

The spelling of 225240172 in words is "two hundred twenty-five million, two hundred forty thousand, one hundred seventy-two".