55123 has 4 divisors (see below), whose sum is σ = 55600. Its totient is φ = 54648.

The previous prime is 55117. The next prime is 55127. The reversal of 55123 is 32155.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55123 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 55097 and 55106.

It is not an unprimeable number, because it can be changed into a prime (55127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61 + ... + 337.

It is an arithmetic number, because the mean of its divisors is an integer number (13900).

2⁵⁵¹²³ is an apocalyptic number.

55123 is a deficient number, since it is larger than the sum of its proper divisors (477).

55123 is a wasteful number, since it uses less digits than its factorization.

55123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476.

The product of its digits is 150, while the sum is 16.

The square root of 55123 is about 234.7828784217. The cubic root of 55123 is about 38.0578527827.

Adding to 55123 its reverse (32155), we get a palindrome (87278).

The spelling of 55123 in words is "fifty-five thousand, one hundred twenty-three".