22404223 has 4 divisors (see below), whose sum is σ = 22429728. Its totient is φ = 22378720.

The previous prime is 22404209. The next prime is 22404229. The reversal of 22404223 is 32240422.

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 22404223 - 2²¹ = 20307071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22404223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22404229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11386 + ... + 13207.

It is an arithmetic number, because the mean of its divisors is an integer number (5607432).

Almost surely, 2^22404223 is an apocalyptic number.

22404223 is a deficient number, since it is larger than the sum of its proper divisors (25505).

22404223 is an equidigital number, since it uses as much as digits as its factorization.

22404223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25504.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 22404223 is about 4733.3099412568. The cubic root of 22404223 is about 281.9096628972.

Adding to 22404223 its reverse (32240422), we get a palindrome (54644645).

The spelling of 22404223 in words is "twenty-two million, four hundred four thousand, two hundred twenty-three".