172438055 has 16 divisors (see below), whose sum is σ = 222191424. Its totient is φ = 128002560.

The previous prime is 172438043. The next prime is 172438069. The reversal of 172438055 is 550834271.

It is a happy number.

It is not a de Polignac number, because 172438055 - 2²⁴ = 155660839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 8252 + ... + 20321.

It is an arithmetic number, because the mean of its divisors is an integer number (13886964).

Almost surely, 2^172438055 is an apocalyptic number.

172438055 is a deficient number, since it is larger than the sum of its proper divisors (49753369).

172438055 is a wasteful number, since it uses less digits than its factorization.

172438055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28666.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 172438055 is about 13131.5671189695. The cubic root of 172438055 is about 556.6014993375.

The spelling of 172438055 in words is "one hundred seventy-two million, four hundred thirty-eight thousand, fifty-five".