22501789 has 2 divisors, whose sum is σ = 22501790. Its totient is φ = 22501788.

The previous prime is 22501777. The next prime is 22501799. The reversal of 22501789 is 98710522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16040025 + 6461764 = 4005^2 + 2542^2 .

It is a cyclic number.

It is not a de Polignac number, because 22501789 - 2¹⁵ = 22469021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22501729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11250894 + 11250895.

It is an arithmetic number, because the mean of its divisors is an integer number (11250895).

Almost surely, 2^22501789 is an apocalyptic number.

It is an amenable number.

22501789 is a deficient number, since it is larger than the sum of its proper divisors (1).

22501789 is an equidigital number, since it uses as much as digits as its factorization.

22501789 is an odious number, because the sum of its binary digits is odd.

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

The square root of 22501789 is about 4743.6050636620. The cubic root of 22501789 is about 282.3182907480.

The spelling of 22501789 in words is "twenty-two million, five hundred one thousand, seven hundred eighty-nine".