23615231 has 4 divisors (see below), whose sum is σ = 23626464. Its totient is φ = 23604000.

The previous prime is 23615219. The next prime is 23615237. The reversal of 23615231 is 13251632.

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 not a de Polignac number, because 23615231 - 2²² = 19420927 is a prime.

It is a super-2 number, since 2×23615231² = 1115358270366722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23615197 and 23615206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23615237) 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, 1415 + ... + 7016.

It is an arithmetic number, because the mean of its divisors is an integer number (5906616).

Almost surely, 2^23615231 is an apocalyptic number.

23615231 is a deficient number, since it is larger than the sum of its proper divisors (11233).

23615231 is an equidigital number, since it uses as much as digits as its factorization.

23615231 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 1080, while the sum is 23.

The square root of 23615231 is about 4859.5504936156. The cubic root of 23615231 is about 286.9001218580.

Adding to 23615231 its reverse (13251632), we get a palindrome (36866863).

The spelling of 23615231 in words is "twenty-three million, six hundred fifteen thousand, two hundred thirty-one".