22100009 has 4 divisors (see below), whose sum is σ = 22172304. Its totient is φ = 22027716.

The previous prime is 22099999. The next prime is 22100041. The reversal of 22100009 is 90000122.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90000122 = 2 ⋅45000061.

It is a cyclic number.

It is not a de Polignac number, because 22100009 - 2¹⁶ = 22034473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22099966 and 22100002.

It is not an unprimeable number, because it can be changed into a prime (22100069) 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, 35687 + ... + 36300.

It is an arithmetic number, because the mean of its divisors is an integer number (5543076).

Almost surely, 2^22100009 is an apocalyptic number.

It is an amenable number.

22100009 is a deficient number, since it is larger than the sum of its proper divisors (72295).

22100009 is an equidigital number, since it uses as much as digits as its factorization.

22100009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72294.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 22100009 is about 4701.0646666473. The cubic root of 22100009 is about 280.6278809333.

The spelling of 22100009 in words is "twenty-two million, one hundred thousand, nine".