22023231 has 4 divisors (see below), whose sum is σ = 29364312. Its totient is φ = 14682152.

The previous prime is 22023229. The next prime is 22023241. The reversal of 22023231 is 13232022.

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 22023231 - 2¹ = 22023229 is a prime.

It is a super-2 number, since 2×22023231² = 970045407358722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22023231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22023241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3670536 + ... + 3670541.

It is an arithmetic number, because the mean of its divisors is an integer number (7341078).

Almost surely, 2^22023231 is an apocalyptic number.

22023231 is a deficient number, since it is larger than the sum of its proper divisors (7341081).

22023231 is an equidigital number, since it uses as much as digits as its factorization.

22023231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7341080.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 22023231 is about 4692.8915393390. The cubic root of 22023231 is about 280.3025259094.

Adding to 22023231 its reverse (13232022), we get a palindrome (35255253).

The spelling of 22023231 in words is "twenty-two million, twenty-three thousand, two hundred thirty-one".