23105231 has 4 divisors (see below), whose sum is σ = 23115000. Its totient is φ = 23095464.

The previous prime is 23105213. The next prime is 23105249. The reversal of 23105231 is 13250132.

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 an interprime number because it is at equal distance from previous prime (23105213) and next prime (23105249).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23105231 is a prime.

It is a super-2 number, since 2×23105231² = 1067703399126722, 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 (23105531) 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, 1145 + ... + 6893.

It is an arithmetic number, because the mean of its divisors is an integer number (5778750).

Almost surely, 2^23105231 is an apocalyptic number.

23105231 is a deficient number, since it is larger than the sum of its proper divisors (9769).

23105231 is an equidigital number, since it uses as much as digits as its factorization.

23105231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9768.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 23105231 is about 4806.7900931911. The cubic root of 23105231 is about 284.8197526528.

Adding to 23105231 its reverse (13250132), we get a palindrome (36355363).

The spelling of 23105231 in words is "twenty-three million, one hundred five thousand, two hundred thirty-one".