172044225 has 36 divisors (see below), whose sum is σ = 312083200. Its totient is φ = 90586080.

The previous prime is 172044179. The next prime is 172044227. The reversal of 172044225 is 522440271.

It is not a de Polignac number, because 172044225 - 2⁹ = 172043713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172044227) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12936 + ... + 22614.

Almost surely, 2^172044225 is an apocalyptic number.

172044225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172044225 is a deficient number, since it is larger than the sum of its proper divisors (140038975).

172044225 is a wasteful number, since it uses less digits than its factorization.

172044225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9774 (or 9766 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 172044225 is about 13116.5630025552. The cubic root of 172044225 is about 556.1774369849.

Adding to 172044225 its reverse (522440271), we get a palindrome (694484496).

The spelling of 172044225 in words is "one hundred seventy-two million, forty-four thousand, two hundred twenty-five".