2216584 has 8 divisors (see below), whose sum is σ = 4156110. Its totient is φ = 1108288.

The previous prime is 2216569. The next prime is 2216587. The reversal of 2216584 is 4856122.

It can be written as a sum of positive squares in only one way, i.e., 1988100 + 228484 = 1410^2 + 478^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 2 + 2³ + 1 + 6⁴ + 5⁹ + 8 + 4⁹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138529 + ... + 138544.

2^2216584 is an apocalyptic number.

It is an amenable number.

2216584 is a deficient number, since it is larger than the sum of its proper divisors (1939526).

2216584 is a wasteful number, since it uses less digits than its factorization.

2216584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277079 (or 277075 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 2216584 is about 1488.8196667159. The cubic root of 2216584 is about 130.3851300996.

The spelling of 2216584 in words is "two million, two hundred sixteen thousand, five hundred eighty-four".