172152225 has 36 divisors (see below), whose sum is σ = 352396096. Its totient is φ = 78697440.

The previous prime is 172152203. The next prime is 172152229. The reversal of 172152225 is 522251271.

It is not a de Polignac number, because 172152225 - 2⁶ = 172152161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172152229) 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, 53077 + ... + 56226.

Almost surely, 2^172152225 is an apocalyptic number.

172152225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172152225 is an abundant number, since it is smaller than the sum of its proper divisors (180243871).

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

172152225 is a wasteful number, since it uses less digits than its factorization.

172152225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109326 (or 109318 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 172152225 is about 13120.6792888173. The cubic root of 172152225 is about 556.2937919485.

The spelling of 172152225 in words is "one hundred seventy-two million, one hundred fifty-two thousand, two hundred twenty-five".