172129255 has 16 divisors (see below), whose sum is σ = 212960160. Its totient is φ = 133498368.

The previous prime is 172129249. The next prime is 172129261. The reversal of 172129255 is 552921271.

It is an interprime number because it is at equal distance from previous prime (172129249) and next prime (172129261).

It is a cyclic number.

It is not a de Polignac number, because 172129255 - 2³ = 172129247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172129255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17539 + ... + 25531.

It is an arithmetic number, because the mean of its divisors is an integer number (13310010).

Almost surely, 2^172129255 is an apocalyptic number.

172129255 is a deficient number, since it is larger than the sum of its proper divisors (40830905).

172129255 is an equidigital number, since it uses as much as digits as its factorization.

172129255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8130.

The product of its digits is 12600, while the sum is 34.

The square root of 172129255 is about 13119.8039238397. The cubic root of 172129255 is about 556.2690490468.

It can be divided in two parts, 1721 and 29255, that added together give a square (30976 = 176²).

The spelling of 172129255 in words is "one hundred seventy-two million, one hundred twenty-nine thousand, two hundred fifty-five".