2221366 has 24 divisors (see below), whose sum is σ = 4083480. Its totient is φ = 901152.

The previous prime is 2221343. The next prime is 2221379. The reversal of 2221366 is 6631222.

It is a happy number.

2221366 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 2⁵ + 2¹¹ + 2¹³ + 1 + 3¹² + 6² + 6⁸ .

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1266 + ... + 2458.

It is an arithmetic number, because the mean of its divisors is an integer number (170145).

2^2221366 is an apocalyptic number.

2221366 is a deficient number, since it is larger than the sum of its proper divisors (1862114).

2221366 is a wasteful number, since it uses less digits than its factorization.

2221366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228 (or 1221 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 2221366 is about 1490.4247716675. The cubic root of 2221366 is about 130.4788259026.

Adding to 2221366 its reverse (6631222), we get a palindrome (8852588).

The spelling of 2221366 in words is "two million, two hundred twenty-one thousand, three hundred sixty-six".