22022509 has 2 divisors, whose sum is σ = 22022510. Its totient is φ = 22022508.

The previous prime is 22022503. The next prime is 22022543. The reversal of 22022509 is 90522022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21650409 + 372100 = 4653^2 + 610^2 .

It is a cyclic number.

It is not a de Polignac number, because 22022509 - 2¹⁵ = 21989741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22022509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22022503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11011254 + 11011255.

It is an arithmetic number, because the mean of its divisors is an integer number (11011255).

Almost surely, 2^22022509 is an apocalyptic number.

It is an amenable number.

22022509 is a deficient number, since it is larger than the sum of its proper divisors (1).

22022509 is an equidigital number, since it uses as much as digits as its factorization.

22022509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 22022509 is about 4692.8146138538. The cubic root of 22022509 is about 280.2994627707.

The spelling of 22022509 in words is "twenty-two million, twenty-two thousand, five hundred nine".