22100209 has 4 divisors (see below), whose sum is σ = 22246720. Its totient is φ = 21953700.

The previous prime is 22100207. The next prime is 22100219. The reversal of 22100209 is 90200122.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 22100209 - 2¹ = 22100207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22100192 and 22100201.

It is not an unprimeable number, because it can be changed into a prime (22100203) 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, 73029 + ... + 73330.

It is an arithmetic number, because the mean of its divisors is an integer number (5561680).

Almost surely, 2^22100209 is an apocalyptic number.

It is an amenable number.

22100209 is a deficient number, since it is larger than the sum of its proper divisors (146511).

22100209 is a wasteful number, since it uses less digits than its factorization.

22100209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146510.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 22100209 is about 4701.0859383764. The cubic root of 22100209 is about 280.6287274700.

The spelling of 22100209 in words is "twenty-two million, one hundred thousand, two hundred nine".