2221868 has 12 divisors (see below), whose sum is σ = 4241832. Its totient is φ = 1009920.

The previous prime is 2221861. The next prime is 2221871. The reversal of 2221868 is 8681222.

2221868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2221868.

It is not an unprimeable number, because it can be changed into a prime (2221861) 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, 25205 + ... + 25292.

It is an arithmetic number, because the mean of its divisors is an integer number (353486).

2^2221868 is an apocalyptic number.

It is an amenable number.

2221868 is a deficient number, since it is larger than the sum of its proper divisors (2019964).

2221868 is a wasteful number, since it uses less digits than its factorization.

2221868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50512 (or 50510 counting only the distinct ones).

The product of its digits is 3072, while the sum is 29.

The square root of 2221868 is about 1490.5931705197. The cubic root of 2221868 is about 130.4886540049.

The spelling of 2221868 in words is "two million, two hundred twenty-one thousand, eight hundred sixty-eight".