55045 has 8 divisors (see below), whose sum is σ = 67320. Its totient is φ = 43200.

The previous prime is 55021. The next prime is 55049. The reversal of 55045 is 54055.

It is a happy number.

55045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 23716 + 31329 = 154^2 + 177^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55045 - 2⁷ = 54917 is a prime.

55045 is a lucky number.

It is a plaindrome in base 15.

It is a congruent number.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451 + ... + 559.

It is an arithmetic number, because the mean of its divisors is an integer number (8415).

2⁵⁵⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

55045 is a deficient number, since it is larger than the sum of its proper divisors (12275).

55045 is a wasteful number, since it uses less digits than its factorization.

55045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215.

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 55045 is about 234.6167086974. The cubic root of 55045 is about 38.0398934688.

Subtracting from 55045 its product of nonzero digits (500), we obtain a palindrome (54545).

Subtracting from 55045 its reverse (54055), we obtain a triangular number (990 = T₄₄).

It can be divided in two parts, 550 and 45, that added together give a palindrome (595).

The spelling of 55045 in words is "fifty-five thousand, forty-five".