22823 has 4 divisors (see below), whose sum is σ = 23640. Its totient is φ = 22008.

The previous prime is 22817. The next prime is 22853. The reversal of 22823 is 32822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32822 = 2 ⋅16411.

It is a cyclic number.

It is not a de Polignac number, because 22823 - 2⁴ = 22807 is a prime.

It is a d-powerful number, because it can be written as 2² + 2¹⁰ + 8² + 2¹¹ + 3⁹ .

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22853) 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, 365 + ... + 422.

It is an arithmetic number, because the mean of its divisors is an integer number (5910).

2²²⁸²³ is an apocalyptic number.

22823 is a deficient number, since it is larger than the sum of its proper divisors (817).

22823 is an equidigital number, since it uses as much as digits as its factorization.

22823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816.

The product of its digits is 192, while the sum is 17.

The square root of 22823 is about 151.0728301185. The cubic root of 22823 is about 28.3655304878.

Subtracting 22823 from its reverse (32822), we obtain a palindrome (9999).

The spelling of 22823 in words is "twenty-two thousand, eight hundred twenty-three".