2216566 has 16 divisors (see below), whose sum is σ = 3697488. Its totient is φ = 988000.

The previous prime is 2216563. The next prime is 2216569. The reversal of 2216566 is 6656122.

2216566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2216563) and next prime (2216569).

It is a pancake number, because a pancake can be divided into 2216566 parts by 2105 straight cuts.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216563) 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 7 ways as a sum of consecutive naturals, for example, 216 + ... + 2116.

It is an arithmetic number, because the mean of its divisors is an integer number (231093).

2^2216566 is an apocalyptic number.

2216566 is a deficient number, since it is larger than the sum of its proper divisors (1480922).

2216566 is a wasteful number, since it uses less digits than its factorization.

2216566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967.

The product of its digits is 4320, while the sum is 28.

The square root of 2216566 is about 1488.8136216464. The cubic root of 2216566 is about 130.3847771633.

The spelling of 2216566 in words is "two million, two hundred sixteen thousand, five hundred sixty-six".