22102209 has 12 divisors (see below), whose sum is σ = 32788756. Its totient is φ = 14336352.

The previous prime is 22102169. The next prime is 22102211. The reversal of 22102209 is 90220122.

It can be written as a sum of positive squares in 2 ways, for example, as 20903184 + 1199025 = 4572^2 + 1095^2 .

It is not a de Polignac number, because 22102209 - 2⁸ = 22101953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22102191 and 22102200.

It is not an unprimeable number, because it can be changed into a prime (22102259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32854 + ... + 33519.

Almost surely, 2^22102209 is an apocalyptic number.

It is an amenable number.

22102209 is a deficient number, since it is larger than the sum of its proper divisors (10686547).

22102209 is a wasteful number, since it uses less digits than its factorization.

22102209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66416 (or 66413 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 22102209 is about 4701.2986503731. The cubic root of 22102209 is about 280.6371925563.

The spelling of 22102209 in words is "twenty-two million, one hundred two thousand, two hundred nine".