2196209 has 4 divisors (see below), whose sum is σ = 2255604.
Its totient is φ = 2136816.
The previous prime is 2196197. The next prime is 2196221. The reversal of 2196209 is 9026912.
It is a semiprime because it is the product of two primes.
It is an interprime number because it is at equal distance from previous prime (2196197) and next prime (2196221).
It can be written as a sum of positive squares in 2 ways, for example, as 1600225 + 595984 = 1265^2 + 772^2
It is a cyclic number.
It is not a de Polignac number, because 2196209 - 216 = 2130673 is a prime.
It is an Ulam number.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (2196239) 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, 29642 + ... + 29715.
It is an arithmetic number, because the mean of its divisors is an integer number (563901).
22196209 is an apocalyptic number.
It is an amenable number.
2196209 is a deficient number, since it is larger than the sum of its proper divisors (59395).
2196209 is an equidigital number, since it uses as much as digits as its factorization.
2196209 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 59394.
The product of its (nonzero) digits is 1944, while the sum is 29.
The square root of 2196209 is about 1481.9612005717.
The cubic root of 2196209 is about 129.9843965493.
The spelling of 2196209 in words is "two million, one hundred ninety-six thousand, two hundred nine".