2221189 has 4 divisors (see below), whose sum is σ = 2230956. Its totient is φ = 2211424.

The previous prime is 2221187. The next prime is 2221217. The reversal of 2221189 is 9811222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 412164 + 1809025 = 642^2 + 1345^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221189 - 2¹ = 2221187 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4534 + ... + 4999.

It is an arithmetic number, because the mean of its divisors is an integer number (557739).

2^2221189 is an apocalyptic number.

It is an amenable number.

2221189 is a deficient number, since it is larger than the sum of its proper divisors (9767).

2221189 is an equidigital number, since it uses as much as digits as its factorization.

2221189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9766.

The product of its digits is 576, while the sum is 25.

The square root of 2221189 is about 1490.3653914393. The cubic root of 2221189 is about 130.4753602625.

The spelling of 2221189 in words is "two million, two hundred twenty-one thousand, one hundred eighty-nine".