2216365 has 4 divisors (see below), whose sum is σ = 2659644. Its totient is φ = 1773088.

The previous prime is 2216363. The next prime is 2216377. The reversal of 2216365 is 5636122.

2216365 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 401956 + 1814409 = 634^2 + 1347^2 .

It is a cyclic number.

It is not a de Polignac number, because 2216365 - 2¹ = 2216363 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 2¹¹ + 1 + 6 + 3¹² + 6⁸ + 5⁵ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216363) 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, 221632 + ... + 221641.

It is an arithmetic number, because the mean of its divisors is an integer number (664911).

2^2216365 is an apocalyptic number.

It is an amenable number.

2216365 is a deficient number, since it is larger than the sum of its proper divisors (443279).

2216365 is an equidigital number, since it uses as much as digits as its factorization.

2216365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443278.

The product of its digits is 2160, while the sum is 25.

The square root of 2216365 is about 1488.7461167036. The cubic root of 2216365 is about 130.3808359118.

The spelling of 2216365 in words is "two million, two hundred sixteen thousand, three hundred sixty-five".