55503 has 12 divisors (see below), whose sum is σ = 91728. Its totient is φ = 31680.

The previous prime is 55501. The next prime is 55511. The reversal of 55503 is 30555.

It is not a de Polignac number, because 55503 - 2¹ = 55501 is a prime.

55503 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 378 + ... + 503.

It is an arithmetic number, because the mean of its divisors is an integer number (7644).

2⁵⁵⁵⁰³ is an apocalyptic number.

55503 is a deficient number, since it is larger than the sum of its proper divisors (36225).

55503 is a wasteful number, since it uses less digits than its factorization.

55503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894 (or 891 counting only the distinct ones).

The product of its (nonzero) digits is 375, while the sum is 18.

The square root of 55503 is about 235.5907468472. The cubic root of 55503 is about 38.1451054037.

The spelling of 55503 in words is "fifty-five thousand, five hundred three".