23281231 has 2 divisors, whose sum is σ = 23281232. Its totient is φ = 23281230.

The previous prime is 23281187. The next prime is 23281241. The reversal of 23281231 is 13218232.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23281231 - 2¹¹ = 23279183 is a prime.

It is a super-2 number, since 2×23281231² = 1084031433750722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23281241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11640615 + 11640616.

It is an arithmetic number, because the mean of its divisors is an integer number (11640616).

Almost surely, 2^23281231 is an apocalyptic number.

23281231 is a deficient number, since it is larger than the sum of its proper divisors (1).

23281231 is an equidigital number, since it uses as much as digits as its factorization.

23281231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 22.

The square root of 23281231 is about 4825.0627975188. The cubic root of 23281231 is about 285.5411121189.

Adding to 23281231 its reverse (13218232), we get a palindrome (36499463).

The spelling of 23281231 in words is "twenty-three million, two hundred eighty-one thousand, two hundred thirty-one".