2188216 has 8 divisors (see below), whose sum is σ = 4102920. Its totient is φ = 1094104.

The previous prime is 2188213. The next prime is 2188231. The reversal of 2188216 is 6128812.

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136756 + ... + 136771.

It is an arithmetic number, because the mean of its divisors is an integer number (512865).

2^2188216 is an apocalyptic number.

It is an amenable number.

2188216 is a deficient number, since it is larger than the sum of its proper divisors (1914704).

2188216 is a wasteful number, since it uses less digits than its factorization.

2188216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273533 (or 273529 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 2188216 is about 1479.2619781499. The cubic root of 2188216 is about 129.8265141471.

The spelling of 2188216 in words is "two million, one hundred eighty-eight thousand, two hundred sixteen".