55485 has 20 divisors (see below), whose sum is σ = 100188. Its totient is φ = 29376.

The previous prime is 55469. The next prime is 55487. The reversal of 55485 is 58455.

It can be written as a sum of positive squares in 2 ways, for example, as 26244 + 29241 = 162^2 + 171^2 .

It is not a de Polignac number, because 55485 - 2⁴ = 55469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

55485 is a lucky number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55487) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 337 + ... + 473.

2⁵⁵⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

55485 is a deficient number, since it is larger than the sum of its proper divisors (44703).

55485 is a wasteful number, since it uses less digits than its factorization.

55485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 145 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 55485 is about 235.5525419094. The cubic root of 55485 is about 38.1409813856.

The spelling of 55485 in words is "fifty-five thousand, four hundred eighty-five".