22523 has 4 divisors (see below), whose sum is σ = 22848. Its totient is φ = 22200.

The previous prime is 22511. The next prime is 22531. The reversal of 22523 is 32522.

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 not a de Polignac number, because 22523 - 2¹⁰ = 21499 is a prime.

It is a Duffinian number.

It is a plaindrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 22498 and 22507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22543) 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, 11 + ... + 212.

It is an arithmetic number, because the mean of its divisors is an integer number (5712).

2²²⁵²³ is an apocalyptic number.

22523 is a deficient number, since it is larger than the sum of its proper divisors (325).

22523 is a wasteful number, since it uses less digits than its factorization.

22523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324.

The product of its digits is 120, while the sum is 14.

The square root of 22523 is about 150.0766470841. The cubic root of 22523 is about 28.2406970699.

Subtracting 22523 from its reverse (32522), we obtain a palindrome (9999).

It can be divided in two parts, 22 and 523, that added together give a palindrome (545).

The spelling of 22523 in words is "twenty-two thousand, five hundred twenty-three".