23855591 has 2 divisors, whose sum is σ = 23855592. Its totient is φ = 23855590.

The previous prime is 23855581. The next prime is 23855593. The reversal of 23855591 is 19555832.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23855591 - 2⁶ = 23855527 is a prime.

Together with 23855593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23855593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11927795 + 11927796.

It is an arithmetic number, because the mean of its divisors is an integer number (11927796).

Almost surely, 2^23855591 is an apocalyptic number.

23855591 is a deficient number, since it is larger than the sum of its proper divisors (1).

23855591 is an equidigital number, since it uses as much as digits as its factorization.

23855591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 38.

The square root of 23855591 is about 4884.2185659530. The cubic root of 23855591 is about 287.8702114199.

The spelling of 23855591 in words is "twenty-three million, eight hundred fifty-five thousand, five hundred ninety-one".