2164216 has 8 divisors (see below), whose sum is σ = 4057920. Its totient is φ = 1082104.

The previous prime is 2164193. The next prime is 2164223. The reversal of 2164216 is 6124612.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135256 + ... + 135271.

It is an arithmetic number, because the mean of its divisors is an integer number (507240).

2^2164216 is an apocalyptic number.

It is an amenable number.

2164216 is a deficient number, since it is larger than the sum of its proper divisors (1893704).

2164216 is a wasteful number, since it uses less digits than its factorization.

2164216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270533 (or 270529 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 2164216 is about 1471.1274587880. The cubic root of 2164216 is about 129.3501294893.

Adding to 2164216 its reverse (6124612), we get a palindrome (8288828).

The spelling of 2164216 in words is "two million, one hundred sixty-four thousand, two hundred sixteen".