23643231 has 4 divisors (see below), whose sum is σ = 31524312. Its totient is φ = 15762152.

The previous prime is 23643227. The next prime is 23643253. The reversal of 23643231 is 13234632.

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 23643231 - 2² = 23643227 is a prime.

It is a super-2 number, since 2×23643231² = 1118004744238722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23643271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3940536 + ... + 3940541.

It is an arithmetic number, because the mean of its divisors is an integer number (7881078).

Almost surely, 2^23643231 is an apocalyptic number.

23643231 is a deficient number, since it is larger than the sum of its proper divisors (7881081).

23643231 is an equidigital number, since it uses as much as digits as its factorization.

23643231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7881080.

The product of its digits is 2592, while the sum is 24.

The square root of 23643231 is about 4862.4305650569. The cubic root of 23643231 is about 287.0134672180.

Adding to 23643231 its reverse (13234632), we get a palindrome (36877863).

The spelling of 23643231 in words is "twenty-three million, six hundred forty-three thousand, two hundred thirty-one".