55545 has 24 divisors (see below), whose sum is σ = 106176. Its totient is φ = 24288.

The previous prime is 55541. The next prime is 55547. The reversal of 55545 is 54555.

It is not a de Polignac number, because 55545 - 2² = 55541 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2404 + ... + 2426.

It is an arithmetic number, because the mean of its divisors is an integer number (4424).

2⁵⁵⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

55545 is a deficient number, since it is larger than the sum of its proper divisors (50631).

55545 is a wasteful number, since it uses less digits than its factorization.

55545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61 (or 38 counting only the distinct ones).

The product of its digits is 2500, while the sum is 24.

The square root of 55545 is about 235.6798676171. The cubic root of 55545 is about 38.1547246464.

Subtracting from 55545 its reverse (54555), we obtain a triangular number (990 = T₄₄).

The spelling of 55545 in words is "fifty-five thousand, five hundred forty-five".