22245909 has 16 divisors (see below), whose sum is σ = 34309632. Its totient is φ = 12557808.

The previous prime is 22245901. The next prime is 22245913. The reversal of 22245909 is 90954222.

It is not a de Polignac number, because 22245909 - 2³ = 22245901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22245909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22245901) 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, 4639 + ... + 8124.

It is an arithmetic number, because the mean of its divisors is an integer number (2144352).

Almost surely, 2^22245909 is an apocalyptic number.

It is an amenable number.

22245909 is a deficient number, since it is larger than the sum of its proper divisors (12063723).

22245909 is a wasteful number, since it uses less digits than its factorization.

22245909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12856.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 22245909 is about 4716.5569009607. The cubic root of 22245909 is about 281.2440773074.

The spelling of 22245909 in words is "twenty-two million, two hundred forty-five thousand, nine hundred nine".