22072189 has 2 divisors, whose sum is σ = 22072190. Its totient is φ = 22072188.

The previous prime is 22072181. The next prime is 22072199. The reversal of 22072189 is 98127022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18992164 + 3080025 = 4358^2 + 1755^2 .

It is a cyclic number.

It is not a de Polignac number, because 22072189 - 2³ = 22072181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22072189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22072181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11036094 + 11036095.

It is an arithmetic number, because the mean of its divisors is an integer number (11036095).

Almost surely, 2^22072189 is an apocalyptic number.

It is an amenable number.

22072189 is a deficient number, since it is larger than the sum of its proper divisors (1).

22072189 is an equidigital number, since it uses as much as digits as its factorization.

22072189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 22072189 is about 4698.1048306737. The cubic root of 22072189 is about 280.5100778765.

The spelling of 22072189 in words is "twenty-two million, seventy-two thousand, one hundred eighty-nine".