23216231 has 4 divisors (see below), whose sum is σ = 23227464. Its totient is φ = 23205000.

The previous prime is 23216183. The next prime is 23216239. The reversal of 23216231 is 13261232.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23216231 is a prime.

It is a super-2 number, since 2×23216231² = 1077986763690722, 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 (23216239) 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, 1520 + ... + 6981.

It is an arithmetic number, because the mean of its divisors is an integer number (5806866).

Almost surely, 2^23216231 is an apocalyptic number.

23216231 is a deficient number, since it is larger than the sum of its proper divisors (11233).

23216231 is an equidigital number, since it uses as much as digits as its factorization.

23216231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11232.

The product of its digits is 432, while the sum is 20.

The square root of 23216231 is about 4818.3224259072. The cubic root of 23216231 is about 285.2751257235.

Adding to 23216231 its reverse (13261232), we get a palindrome (36477463).

The spelling of 23216231 in words is "twenty-three million, two hundred sixteen thousand, two hundred thirty-one".