2213864 has 16 divisors (see below), whose sum is σ = 4185600. Its totient is φ = 1097712.

The previous prime is 2213843. The next prime is 2213867. The reversal of 2213864 is 4683122.

2213864 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2213867) 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, 74 + ... + 2105.

It is an arithmetic number, because the mean of its divisors is an integer number (261600).

2^2213864 is an apocalyptic number.

It is an amenable number.

2213864 is a deficient number, since it is larger than the sum of its proper divisors (1971736).

2213864 is a wasteful number, since it uses less digits than its factorization.

2213864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2312 (or 2308 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 2213864 is about 1487.9059110038. The cubic root of 2213864 is about 130.3317758216.

Adding to 2213864 its reverse (4683122), we get a palindrome (6896986).

The spelling of 2213864 in words is "two million, two hundred thirteen thousand, eight hundred sixty-four".