2213209 has 2 divisors, whose sum is σ = 2213210. Its totient is φ = 2213208.

The previous prime is 2213203. The next prime is 2213243. The reversal of 2213209 is 9023122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1849600 + 363609 = 1360^2 + 603^2 .

It is a cyclic number.

It is not a de Polignac number, because 2213209 - 2³ = 2213201 is a prime.

It is not a weakly prime, because it can be changed into another prime (2213201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106604 + 1106605.

It is an arithmetic number, because the mean of its divisors is an integer number (1106605).

2^2213209 is an apocalyptic number.

It is an amenable number.

2213209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2213209 is an equidigital number, since it uses as much as digits as its factorization.

2213209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 2213209 is about 1487.6857867171. The cubic root of 2213209 is about 130.3189211124.

It can be divided in two parts, 22 and 13209, that added together give a palindrome (13231).

The spelling of 2213209 in words is "two million, two hundred thirteen thousand, two hundred nine".