55021173 has 4 divisors (see below), whose sum is σ = 73361568. Its totient is φ = 36680780.

The previous prime is 55021171. The next prime is 55021177. The reversal of 55021173 is 37112055.

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 55021173 - 2¹ = 55021171 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55021171) 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, 9170193 + ... + 9170198.

It is an arithmetic number, because the mean of its divisors is an integer number (18340392).

Almost surely, 2^55021173 is an apocalyptic number.

It is an amenable number.

55021173 is a deficient number, since it is larger than the sum of its proper divisors (18340395).

55021173 is a wasteful number, since it uses less digits than its factorization.

55021173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18340394.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 55021173 is about 7417.6258331086. The cubic root of 55021173 is about 380.3440397624.

The spelling of 55021173 in words is "fifty-five million, twenty-one thousand, one hundred seventy-three".