2172055 has 4 divisors (see below), whose sum is σ = 2606472. Its totient is φ = 1737640.

The previous prime is 2172047. The next prime is 2172067. The reversal of 2172055 is 5502712.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2172055 - 2³ = 2172047 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.

2172055 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217201 + ... + 217210.

It is an arithmetic number, because the mean of its divisors is an integer number (651618).

2^2172055 is an apocalyptic number.

2172055 is a deficient number, since it is larger than the sum of its proper divisors (434417).

2172055 is an equidigital number, since it uses as much as digits as its factorization.

2172055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434416.

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

The square root of 2172055 is about 1473.7893336566. The cubic root of 2172055 is about 129.5061142097.

Adding to 2172055 its reverse (5502712), we get a palindrome (7674767).

The spelling of 2172055 in words is "two million, one hundred seventy-two thousand, fifty-five".