23557559 has 2 divisors, whose sum is σ = 23557560. Its totient is φ = 23557558.

The previous prime is 23557537. The next prime is 23557571. The reversal of 23557559 is 95575532.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23557559 - 2¹² = 23553463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23557519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11778779 + 11778780.

It is an arithmetic number, because the mean of its divisors is an integer number (11778780).

Almost surely, 2^23557559 is an apocalyptic number.

23557559 is a deficient number, since it is larger than the sum of its proper divisors (1).

23557559 is an equidigital number, since it uses as much as digits as its factorization.

23557559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 236250, while the sum is 41.

The square root of 23557559 is about 4853.6129841593. The cubic root of 23557559 is about 286.6663801752. Note that the first 3 decimals are identical.

The spelling of 23557559 in words is "twenty-three million, five hundred fifty-seven thousand, five hundred fifty-nine".