55091173 has 4 divisors (see below), whose sum is σ = 55321920. Its totient is φ = 54860428.

The previous prime is 55091171. The next prime is 55091177. The reversal of 55091173 is 37119055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55091173 - 2¹ = 55091171 is a prime.

It is a Smith number, since the sum of its digits (31) 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 (55091171) 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, 115015 + ... + 115492.

It is an arithmetic number, because the mean of its divisors is an integer number (13830480).

Almost surely, 2^55091173 is an apocalyptic number.

It is an amenable number.

55091173 is a deficient number, since it is larger than the sum of its proper divisors (230747).

55091173 is a wasteful number, since it uses less digits than its factorization.

55091173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230746.

The product of its (nonzero) digits is 4725, while the sum is 31.

The square root of 55091173 is about 7422.3428242032. The cubic root of 55091173 is about 380.5052673928.

The spelling of 55091173 in words is "fifty-five million, ninety-one thousand, one hundred seventy-three".