2216805 has 8 divisors (see below), whose sum is σ = 3546912. Its totient is φ = 1182288.

The previous prime is 2216803. The next prime is 2216821. The reversal of 2216805 is 5086122.

2216805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2216805 - 2¹ = 2216803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216803) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 73879 + ... + 73908.

It is an arithmetic number, because the mean of its divisors is an integer number (443364).

2^2216805 is an apocalyptic number.

It is an amenable number.

2216805 is a deficient number, since it is larger than the sum of its proper divisors (1330107).

2216805 is a wasteful number, since it uses less digits than its factorization.

2216805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147795.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 2216805 is about 1488.8938847346. The cubic root of 2216805 is about 130.3894632170.

The spelling of 2216805 in words is "two million, two hundred sixteen thousand, eight hundred five".