22195889 has 2 divisors, whose sum is σ = 22195890. Its totient is φ = 22195888.

The previous prime is 22195871. The next prime is 22195981. The reversal of 22195889 is 98859122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22165264 + 30625 = 4708^2 + 175^2 .

It is a cyclic number.

It is not a de Polignac number, because 22195889 - 2⁸ = 22195633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22192889) 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, 11097944 + 11097945.

It is an arithmetic number, because the mean of its divisors is an integer number (11097945).

Almost surely, 2^22195889 is an apocalyptic number.

It is an amenable number.

22195889 is a deficient number, since it is larger than the sum of its proper divisors (1).

22195889 is an equidigital number, since it uses as much as digits as its factorization.

22195889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 44.

The square root of 22195889 is about 4711.2513199786. The cubic root of 22195889 is about 281.0331263742.

The spelling of 22195889 in words is "twenty-two million, one hundred ninety-five thousand, eight hundred eighty-nine".