2216789 has 4 divisors (see below), whose sum is σ = 2293260. Its totient is φ = 2140320.

The previous prime is 2216777. The next prime is 2216803. The reversal of 2216789 is 9876122.

It is a happy number.

2216789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 348100 + 1868689 = 590^2 + 1367^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2216789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216729) 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 3 ways as a sum of consecutive naturals, for example, 38192 + ... + 38249.

It is an arithmetic number, because the mean of its divisors is an integer number (573315).

2^2216789 is an apocalyptic number.

2216789 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2216789 is a deficient number, since it is larger than the sum of its proper divisors (76471).

2216789 is an equidigital number, since it uses as much as digits as its factorization.

2216789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76470.

The product of its digits is 12096, while the sum is 35.

The square root of 2216789 is about 1488.8885116086. Note that the first 3 decimals coincide. The cubic root of 2216789 is about 130.3891495168.

The spelling of 2216789 in words is "two million, two hundred sixteen thousand, seven hundred eighty-nine".