2221626 has 32 divisors (see below), whose sum is σ = 4971456. Its totient is φ = 656000.

The previous prime is 2221589. The next prime is 2221631. The reversal of 2221626 is 6261222.

2221626 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 2296 + ... + 3116.

It is an arithmetic number, because the mean of its divisors is an integer number (155358).

2^2221626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2485728).

2221626 is an abundant number, since it is smaller than the sum of its proper divisors (2749830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2221626 is a wasteful number, since it uses less digits than its factorization.

2221626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878.

The product of its digits is 576, while the sum is 21.

The square root of 2221626 is about 1490.5119925717. The cubic root of 2221626 is about 130.4839163396.

Adding to 2221626 its reverse (6261222), we get a palindrome (8482848).

The spelling of 2221626 in words is "two million, two hundred twenty-one thousand, six hundred twenty-six".