22433231 has 4 divisors (see below), whose sum is σ = 22749264. Its totient is φ = 22117200.

The previous prime is 22433221. The next prime is 22433237. The reversal of 22433231 is 13233422.

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 22433231 - 2¹⁴ = 22416847 is a prime.

It is a super-2 number, since 2×22433231² = 1006499706198722, 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 (22433237) 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, 157910 + ... + 158051.

It is an arithmetic number, because the mean of its divisors is an integer number (5687316).

Almost surely, 2^22433231 is an apocalyptic number.

22433231 is a deficient number, since it is larger than the sum of its proper divisors (316033).

22433231 is an equidigital number, since it uses as much as digits as its factorization.

22433231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316032.

The product of its digits is 864, while the sum is 20.

The square root of 22433231 is about 4736.3731905330. The cubic root of 22433231 is about 282.0312784916.

Adding to 22433231 its reverse (13233422), we get a palindrome (35666653).

The spelling of 22433231 in words is "twenty-two million, four hundred thirty-three thousand, two hundred thirty-one".