172655223 has 32 divisors (see below), whose sum is σ = 267375360. Its totient is φ = 98184960.

The previous prime is 172655207. The next prime is 172655233. The reversal of 172655223 is 322556271.

It is not a de Polignac number, because 172655223 - 2⁴ = 172655207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172655233) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 27540 + ... + 33222.

It is an arithmetic number, because the mean of its divisors is an integer number (8355480).

Almost surely, 2^172655223 is an apocalyptic number.

172655223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

172655223 is a deficient number, since it is larger than the sum of its proper divisors (94720137).

172655223 is a wasteful number, since it uses less digits than its factorization.

172655223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5759.

The product of its digits is 25200, while the sum is 33.

The square root of 172655223 is about 13139.8334464330. The cubic root of 172655223 is about 556.8350621015.

The spelling of 172655223 in words is "one hundred seventy-two million, six hundred fifty-five thousand, two hundred twenty-three".