23212231 has 6 divisors (see below), whose sum is σ = 27002040. Its totient is φ = 19896156.

The previous prime is 23212207. The next prime is 23212247. The reversal of 23212231 is 13221232.

It is not a de Polignac number, because 23212231 - 2⁵ = 23212199 is a prime.

It is a super-2 number, since 2×23212231² = 1077615335994722, 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 (23212271) 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 5 ways as a sum of consecutive naturals, for example, 236811 + ... + 236908.

It is an arithmetic number, because the mean of its divisors is an integer number (4500340).

Almost surely, 2^23212231 is an apocalyptic number.

23212231 is a deficient number, since it is larger than the sum of its proper divisors (3789809).

23212231 is an equidigital number, since it uses as much as digits as its factorization.

23212231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473733 (or 473726 counting only the distinct ones).

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

The square root of 23212231 is about 4817.9073258003. The cubic root of 23212231 is about 285.2587411225.

Adding to 23212231 its reverse (13221232), we get a palindrome (36433463).

Subtracting from 23212231 its reverse (13221232), we obtain a palindrome (9990999).

The spelling of 23212231 in words is "twenty-three million, two hundred twelve thousand, two hundred thirty-one".