55023 has 4 divisors (see below), whose sum is σ = 73368. Its totient is φ = 36680.

The previous prime is 55021. The next prime is 55049. The reversal of 55023 is 32055.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55023 - 2¹ = 55021 is a prime.

It is a D-number.

55023 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 54993 and 55011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55021) 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, 9168 + ... + 9173.

It is an arithmetic number, because the mean of its divisors is an integer number (18342).

2⁵⁵⁰²³ is an apocalyptic number.

55023 is a deficient number, since it is larger than the sum of its proper divisors (18345).

55023 is a wasteful number, since it uses less digits than its factorization.

55023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18344.

The product of its (nonzero) digits is 150, while the sum is 15.

The square root of 55023 is about 234.5698190305. The cubic root of 55023 is about 38.0348249541.

Adding to 55023 its reverse (32055), we get a palindrome (87078).

The spelling of 55023 in words is "fifty-five thousand, twenty-three".