22123231 has 8 divisors (see below), whose sum is σ = 24406704. Its totient is φ = 19922880.

The previous prime is 22123187. The next prime is 22123237. The reversal of 22123231 is 13232122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22123231 - 2⁹ = 22122719 is a prime.

It is a super-2 number, since 2×22123231² = 978874699758722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22123237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20221 + ... + 21286.

It is an arithmetic number, because the mean of its divisors is an integer number (3050838).

Almost surely, 2^22123231 is an apocalyptic number.

22123231 is a deficient number, since it is larger than the sum of its proper divisors (2283473).

22123231 is a wasteful number, since it uses less digits than its factorization.

22123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41561.

The product of its digits is 144, while the sum is 16.

The square root of 22123231 is about 4703.5338842194. The cubic root of 22123231 is about 280.7261382003.

Adding to 22123231 its reverse (13232122), we get a palindrome (35355353).

The spelling of 22123231 in words is "twenty-two million, one hundred twenty-three thousand, two hundred thirty-one".