55180 has 24 divisors (see below), whose sum is σ = 120960. Its totient is φ = 21120.

The previous prime is 55171. The next prime is 55201. The reversal of 55180 is 8155.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 576 + ... + 664.

It is an arithmetic number, because the mean of its divisors is an integer number (5040).

2⁵⁵¹⁸⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60480).

55180 is an abundant number, since it is smaller than the sum of its proper divisors (65780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55180 is a wasteful number, since it uses less digits than its factorization.

55180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 55180 is about 234.9042358068. The cubic root of 55180 is about 38.0709661856.

The spelling of 55180 in words is "fifty-five thousand, one hundred eighty".