172002055 has 4 divisors (see below), whose sum is σ = 206402472. Its totient is φ = 137601640.

The previous prime is 172002053. The next prime is 172002059. The reversal of 172002055 is 550200271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550200271 = 19 ⋅28957909.

It is not a de Polignac number, because 172002055 - 2¹ = 172002053 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172002053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17200201 + ... + 17200210.

It is an arithmetic number, because the mean of its divisors is an integer number (51600618).

Almost surely, 2^172002055 is an apocalyptic number.

172002055 is a deficient number, since it is larger than the sum of its proper divisors (34400417).

172002055 is an equidigital number, since it uses as much as digits as its factorization.

172002055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34400416.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 172002055 is about 13114.9553945105. The cubic root of 172002055 is about 556.1319914625.

The spelling of 172002055 in words is "one hundred seventy-two million, two thousand, fifty-five".