2221369 has 4 divisors (see below), whose sum is σ = 2281444. Its totient is φ = 2161296.

The previous prime is 2221343. The next prime is 2221379. The reversal of 2221369 is 9631222.

It is a happy number.

2221369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1904400 + 316969 = 1380^2 + 563^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221369 is a prime.

It is a super-2 number, since 2×2221369² = 9868960468322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221379) 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 3 ways as a sum of consecutive naturals, for example, 29982 + ... + 30055.

It is an arithmetic number, because the mean of its divisors is an integer number (570361).

2^2221369 is an apocalyptic number.

It is an amenable number.

2221369 is a deficient number, since it is larger than the sum of its proper divisors (60075).

2221369 is an equidigital number, since it uses as much as digits as its factorization.

2221369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60074.

The product of its digits is 1296, while the sum is 25.

The square root of 2221369 is about 1490.4257780916. The cubic root of 2221369 is about 130.4788846407.

The spelling of 2221369 in words is "two million, two hundred twenty-one thousand, three hundred sixty-nine".