23328581 has 2 divisors, whose sum is σ = 23328582. Its totient is φ = 23328580.

The previous prime is 23328553. The next prime is 23328593. The reversal of 23328581 is 18582332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21252100 + 2076481 = 4610^2 + 1441^2 .

It is a cyclic number.

It is not a de Polignac number, because 23328581 - 2⁶ = 23328517 is a prime.

It is a super-2 number, since 2×23328581² = 1088445382947122, 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 (23328521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11664290 + 11664291.

It is an arithmetic number, because the mean of its divisors is an integer number (11664291).

Almost surely, 2^23328581 is an apocalyptic number.

It is an amenable number.

23328581 is a deficient number, since it is larger than the sum of its proper divisors (1).

23328581 is an equidigital number, since it uses as much as digits as its factorization.

23328581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 32.

The square root of 23328581 is about 4829.9669771128. The cubic root of 23328581 is about 285.7345614540.

The spelling of 23328581 in words is "twenty-three million, three hundred twenty-eight thousand, five hundred eighty-one".