22644223 has 12 divisors (see below), whose sum is σ = 26421552. Its totient is φ = 19350240.

The previous prime is 22644217. The next prime is 22644247. The reversal of 22644223 is 32244622.

It is a de Polignac number, because none of the positive numbers 2^k-22644223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22644203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25086 + ... + 25972.

It is an arithmetic number, because the mean of its divisors is an integer number (2201796).

Almost surely, 2^22644223 is an apocalyptic number.

22644223 is a deficient number, since it is larger than the sum of its proper divisors (3777329).

22644223 is an equidigital number, since it uses as much as digits as its factorization.

22644223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422 (or 1415 counting only the distinct ones).

The product of its digits is 4608, while the sum is 25.

The square root of 22644223 is about 4758.5946454810. The cubic root of 22644223 is about 282.9127201537.

Adding to 22644223 its reverse (32244622), we get a palindrome (54888845).

The spelling of 22644223 in words is "twenty-two million, six hundred forty-four thousand, two hundred twenty-three".