2162209 has 4 divisors (see below), whose sum is σ = 2471104. Its totient is φ = 1853316.

The previous prime is 2162203. The next prime is 2162221. The reversal of 2162209 is 9022612.

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 2162209 - 2⁵ = 2162177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2162209.

It is not an unprimeable number, because it can be changed into a prime (2162203) 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, 154437 + ... + 154450.

It is an arithmetic number, because the mean of its divisors is an integer number (617776).

2^2162209 is an apocalyptic number.

It is an amenable number.

2162209 is a deficient number, since it is larger than the sum of its proper divisors (308895).

2162209 is an equidigital number, since it uses as much as digits as its factorization.

2162209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308894.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 2162209 is about 1470.4451706881. The cubic root of 2162209 is about 129.3101325573.

The spelling of 2162209 in words is "two million, one hundred sixty-two thousand, two hundred nine".