22559891 has 2 divisors, whose sum is σ = 22559892. Its totient is φ = 22559890.

The previous prime is 22559879. The next prime is 22559893. The reversal of 22559891 is 19895522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22559891 - 2⁶ = 22559827 is a prime.

It is a Sophie Germain prime.

Together with 22559893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22559893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11279945 + 11279946.

It is an arithmetic number, because the mean of its divisors is an integer number (11279946).

Almost surely, 2^22559891 is an apocalyptic number.

22559891 is a deficient number, since it is larger than the sum of its proper divisors (1).

22559891 is an equidigital number, since it uses as much as digits as its factorization.

22559891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 41.

The square root of 22559891 is about 4749.7253604814. The cubic root of 22559891 is about 282.5610738031.

The spelling of 22559891 in words is "twenty-two million, five hundred fifty-nine thousand, eight hundred ninety-one".