22257889 has 2 divisors, whose sum is σ = 22257890. Its totient is φ = 22257888.

The previous prime is 22257887. The next prime is 22257901. The reversal of 22257889 is 98875222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20250000 + 2007889 = 4500^2 + 1417^2 .

It is a cyclic number.

It is not a de Polignac number, because 22257889 - 2¹ = 22257887 is a prime.

Together with 22257887, it forms a pair of twin primes.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (22257881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11128944 + 11128945.

It is an arithmetic number, because the mean of its divisors is an integer number (11128945).

Almost surely, 2^22257889 is an apocalyptic number.

It is an amenable number.

22257889 is a deficient number, since it is larger than the sum of its proper divisors (1).

22257889 is an equidigital number, since it uses as much as digits as its factorization.

22257889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 43.

The square root of 22257889 is about 4717.8267242450. The cubic root of 22257889 is about 281.2945539951.

The spelling of 22257889 in words is "twenty-two million, two hundred fifty-seven thousand, eight hundred eighty-nine".