22559509 has 4 divisors (see below), whose sum is σ = 25782304. Its totient is φ = 19336716.

The previous prime is 22559507. The next prime is 22559513. The reversal of 22559509 is 90595522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 22559509 - 2¹ = 22559507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22559501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1611387 + ... + 1611400.

It is an arithmetic number, because the mean of its divisors is an integer number (6445576).

Almost surely, 2^22559509 is an apocalyptic number.

It is an amenable number.

22559509 is a deficient number, since it is larger than the sum of its proper divisors (3222795).

22559509 is an equidigital number, since it uses as much as digits as its factorization.

22559509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222794.

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 22559509 is about 4749.6851474598. The cubic root of 22559509 is about 282.5594789529.

The spelling of 22559509 in words is "twenty-two million, five hundred fifty-nine thousand, five hundred nine".