55823 has 2 divisors, whose sum is σ = 55824. Its totient is φ = 55822.

The previous prime is 55819. The next prime is 55829. The reversal of 55823 is 32855.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55823 - 2² = 55819 is a prime.

It is equal to p₅₆₆₆ and since 55823 and 5666 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27911 + 27912.

It is an arithmetic number, because the mean of its divisors is an integer number (27912).

2⁵⁵⁸²³ is an apocalyptic number.

55823 is a deficient number, since it is larger than the sum of its proper divisors (1).

55823 is an equidigital number, since it uses as much as digits as its factorization.

55823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 23.

The square root of 55823 is about 236.2689145867. The cubic root of 55823 is about 38.2182729204.

It can be divided in two parts, 55 and 823, that added together give a palindrome (878).

The spelling of 55823 in words is "fifty-five thousand, eight hundred twenty-three".