22297509 has 12 divisors (see below), whose sum is σ = 34685196. Its totient is φ = 13721472.

The previous prime is 22297477. The next prime is 22297537. The reversal of 22297509 is 90579222.

It can be written as a sum of positive squares in 2 ways, for example, as 3348900 + 18948609 = 1830^2 + 4353^2 .

It is not a de Polignac number, because 22297509 - 2⁵ = 22297477 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22297579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95172 + ... + 95405.

It is an arithmetic number, because the mean of its divisors is an integer number (2890433).

Almost surely, 2^22297509 is an apocalyptic number.

It is an amenable number.

22297509 is a deficient number, since it is larger than the sum of its proper divisors (12387687).

22297509 is a wasteful number, since it uses less digits than its factorization.

22297509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190596 (or 190593 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 22297509 is about 4722.0238245905. The cubic root of 22297509 is about 281.4613605293.

The spelling of 22297509 in words is "twenty-two million, two hundred ninety-seven thousand, five hundred nine".