2221009 has 8 divisors (see below), whose sum is σ = 2565248. Its totient is φ = 1883520.

The previous prime is 2221007. The next prime is 2221019. The reversal of 2221009 is 9001222.

It is a happy number.

2221009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2221009 - 2¹ = 2221007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2220983 and 2221001.

It is not an unprimeable number, because it can be changed into a prime (2221007) 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, 957 + ... + 2314.

It is an arithmetic number, because the mean of its divisors is an integer number (320656).

2^2221009 is an apocalyptic number.

It is an amenable number.

2221009 is a deficient number, since it is larger than the sum of its proper divisors (344239).

2221009 is an equidigital number, since it uses as much as digits as its factorization.

2221009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3375.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2221009 is about 1490.3050023401. The cubic root of 2221009 is about 130.4718356938.

The spelling of 2221009 in words is "two million, two hundred twenty-one thousand, nine".