22431223 has 4 divisors (see below), whose sum is σ = 22978368. Its totient is φ = 21884080.

The previous prime is 22431209. The next prime is 22431263. The reversal of 22431223 is 32213422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32213422 = 2 ⋅16106711.

It is a cyclic number.

It is not a de Polignac number, because 22431223 - 2⁹ = 22430711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22431223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22431263) 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, 273511 + ... + 273592.

It is an arithmetic number, because the mean of its divisors is an integer number (5744592).

Almost surely, 2^22431223 is an apocalyptic number.

22431223 is a deficient number, since it is larger than the sum of its proper divisors (547145).

22431223 is an equidigital number, since it uses as much as digits as its factorization.

22431223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547144.

The product of its digits is 576, while the sum is 19.

The square root of 22431223 is about 4736.1612092495. The cubic root of 22431223 is about 282.0228633610.

Adding to 22431223 its reverse (32213422), we get a palindrome (54644645).

The spelling of 22431223 in words is "twenty-two million, four hundred thirty-one thousand, two hundred twenty-three".