22265009 has 16 divisors (see below), whose sum is σ = 25248720. Its totient is φ = 19491840.

The previous prime is 22264997. The next prime is 22265039. The reversal of 22265009 is 90056222.

It can be written as a sum of positive squares in 8 ways, for example, as 5017600 + 17247409 = 2240^2 + 4153^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22265009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22265039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19157 + ... + 20285.

It is an arithmetic number, because the mean of its divisors is an integer number (1578045).

Almost surely, 2^22265009 is an apocalyptic number.

It is an amenable number.

22265009 is a deficient number, since it is larger than the sum of its proper divisors (2983711).

22265009 is a wasteful number, since it uses less digits than its factorization.

22265009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 22265009 is about 4718.5812486382. The cubic root of 22265009 is about 281.3245449151.

The spelling of 22265009 in words is "twenty-two million, two hundred sixty-five thousand, nine".