22642223 has 4 divisors (see below), whose sum is σ = 22896720. Its totient is φ = 22387728.

The previous prime is 22642211. The next prime is 22642229. The reversal of 22642223 is 32224622.

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 22642223 - 2⁶ = 22642159 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 (22642229) 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, 127115 + ... + 127292.

It is an arithmetic number, because the mean of its divisors is an integer number (5724180).

Almost surely, 2^22642223 is an apocalyptic number.

22642223 is a deficient number, since it is larger than the sum of its proper divisors (254497).

22642223 is an equidigital number, since it uses as much as digits as its factorization.

22642223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254496.

The product of its digits is 2304, while the sum is 23.

The square root of 22642223 is about 4758.3844947629. The cubic root of 22642223 is about 282.9043906989.

Adding to 22642223 its reverse (32224622), we get a palindrome (54866845).

The spelling of 22642223 in words is "twenty-two million, six hundred forty-two thousand, two hundred twenty-three".