22157089 has 2 divisors, whose sum is σ = 22157090. Its totient is φ = 22157088.

The previous prime is 22157081. The next prime is 22157123. The reversal of 22157089 is 98075122.

It is an a-pointer prime, because the next prime (22157123) can be obtained adding 22157089 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20857489 + 1299600 = 4567^2 + 1140^2 .

It is a cyclic number.

It is not a de Polignac number, because 22157089 - 2³ = 22157081 is a prime.

It is not a weakly prime, because it can be changed into another prime (22157081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11078544 + 11078545.

It is an arithmetic number, because the mean of its divisors is an integer number (11078545).

Almost surely, 2^22157089 is an apocalyptic number.

It is an amenable number.

22157089 is a deficient number, since it is larger than the sum of its proper divisors (1).

22157089 is an equidigital number, since it uses as much as digits as its factorization.

22157089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 22157089 is about 4707.1317168739. The cubic root of 22157089 is about 280.8692755339.

The spelling of 22157089 in words is "twenty-two million, one hundred fifty-seven thousand, eighty-nine".