2209218 has 48 divisors (see below), whose sum is σ = 5171040. Its totient is φ = 626560.

The previous prime is 2209217. The next prime is 2209231. The reversal of 2209218 is 8129022.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2209213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12253 + ... + 12431.

It is an arithmetic number, because the mean of its divisors is an integer number (107730).

2^2209218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2209218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2585520).

2209218 is an abundant number, since it is smaller than the sum of its proper divisors (2961822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2209218 is a wasteful number, since it uses less digits than its factorization.

2209218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 2209218 is about 1486.3438363986. The cubic root of 2209218 is about 130.2405408427.

The spelling of 2209218 in words is "two million, two hundred nine thousand, two hundred eighteen".