23922581 has 2 divisors, whose sum is σ = 23922582. Its totient is φ = 23922580.

The previous prime is 23922533. The next prime is 23922601. The reversal of 23922581 is 18522932.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23367556 + 555025 = 4834^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 23922581 - 2⁶ = 23922517 is a prime.

It is a super-2 number, since 2×23922581² = 1144579763403122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23924581) 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 as a sum of consecutive naturals, namely, 11961290 + 11961291.

It is an arithmetic number, because the mean of its divisors is an integer number (11961291).

Almost surely, 2^23922581 is an apocalyptic number.

It is an amenable number.

23922581 is a deficient number, since it is larger than the sum of its proper divisors (1).

23922581 is an equidigital number, since it uses as much as digits as its factorization.

23922581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 23922581 is about 4891.0715594847. The cubic root of 23922581 is about 288.1394201826.

The spelling of 23922581 in words is "twenty-three million, nine hundred twenty-two thousand, five hundred eighty-one".