55044 has 36 divisors (see below), whose sum is σ = 152880. Its totient is φ = 16560.

The previous prime is 55021. The next prime is 55049. The reversal of 55044 is 44055.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (55049) by changing a digit.

55044 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 327 + ... + 465.

2⁵⁵⁰⁴⁴ 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 55044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76440).

55044 is an abundant number, since it is smaller than the sum of its proper divisors (97836).

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

55044 is a wasteful number, since it uses less digits than its factorization.

55044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 55044 is about 234.6145775522. The cubic root of 55044 is about 38.0396631111.

Adding to 55044 its reverse (44055), we get a palindrome (99099).

The spelling of 55044 in words is "fifty-five thousand, forty-four".