55189 has 4 divisors (see below), whose sum is σ = 55660. Its totient is φ = 54720.

The previous prime is 55171. The next prime is 55201. The reversal of 55189 is 98155.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 47089 + 8100 = 217^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 55189 - 2⁷ = 55061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55109) 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, 109 + ... + 349.

It is an arithmetic number, because the mean of its divisors is an integer number (13915).

2⁵⁵¹⁸⁹ is an apocalyptic number.

It is an amenable number.

55189 is a deficient number, since it is larger than the sum of its proper divisors (471).

55189 is a wasteful number, since it uses less digits than its factorization.

55189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470.

The product of its digits is 1800, while the sum is 28.

The square root of 55189 is about 234.9233917685. The cubic root of 55189 is about 38.0730358972.

The spelling of 55189 in words is "fifty-five thousand, one hundred eighty-nine".