172257375 has 16 divisors (see below), whose sum is σ = 286636896. Its totient is φ = 91870400.

The previous prime is 172257347. The next prime is 172257377. The reversal of 172257375 is 573752271.

It is not a de Polignac number, because 172257375 - 2⁵ = 172257343 is a prime.

It is a super-3 number, since 3×172257375³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172257377) 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 15 ways as a sum of consecutive naturals, for example, 229302 + ... + 230051.

It is an arithmetic number, because the mean of its divisors is an integer number (17914806).

Almost surely, 2^172257375 is an apocalyptic number.

172257375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

172257375 is a deficient number, since it is larger than the sum of its proper divisors (114379521).

172257375 is an equidigital number, since it uses as much as digits as its factorization.

172257375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459371 (or 459361 counting only the distinct ones).

The product of its digits is 102900, while the sum is 39.

The square root of 172257375 is about 13124.6857105227. The cubic root of 172257375 is about 556.4070296889.

The spelling of 172257375 in words is "one hundred seventy-two million, two hundred fifty-seven thousand, three hundred seventy-five".