16222209 has 4 divisors (see below), whose sum is σ = 21629616. Its totient is φ = 10814804.

The previous prime is 16222127. The next prime is 16222211. The reversal of 16222209 is 90222261.

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 16222209 - 2⁹ = 16221697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16222259) 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, 2703699 + ... + 2703704.

It is an arithmetic number, because the mean of its divisors is an integer number (5407404).

Almost surely, 2^16222209 is an apocalyptic number.

It is an amenable number.

16222209 is a deficient number, since it is larger than the sum of its proper divisors (5407407).

16222209 is an equidigital number, since it uses as much as digits as its factorization.

16222209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5407406.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 16222209 is about 4027.6803497795. The cubic root of 16222209 is about 253.1453751622.

The spelling of 16222209 in words is "sixteen million, two hundred twenty-two thousand, two hundred nine".