22201809 has 16 divisors (see below), whose sum is σ = 34082688. Its totient is φ = 12592512.

The previous prime is 22201807. The next prime is 22201819. The reversal of 22201809 is 90810222.

It is not a de Polignac number, because 22201809 - 2¹ = 22201807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22201801) 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, 982 + ... + 6735.

It is an arithmetic number, because the mean of its divisors is an integer number (2130168).

Almost surely, 2^22201809 is an apocalyptic number.

It is an amenable number.

22201809 is a deficient number, since it is larger than the sum of its proper divisors (11880879).

22201809 is a wasteful number, since it uses less digits than its factorization.

22201809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7864.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 22201809 is about 4711.8795612791. The cubic root of 22201809 is about 281.0581095023.

The spelling of 22201809 in words is "twenty-two million, two hundred one thousand, eight hundred nine".