2217204 has 54 divisors (see below), whose sum is σ = 6172530. Its totient is φ = 670560.

The previous prime is 2217199. The next prime is 2217211. The reversal of 2217204 is 4027122.

2217204 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2108304 + 108900 = 1452^2 + 330^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4102 + ... + 4610.

2^2217204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2217204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3086265).

2217204 is an abundant number, since it is smaller than the sum of its proper divisors (3955326).

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

2217204 is a wasteful number, since it uses less digits than its factorization.

2217204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 2217204 is about 1489.0278707936. The cubic root of 2217204 is about 130.3972856273.

The spelling of 2217204 in words is "two million, two hundred seventeen thousand, two hundred four".