2221229 has 2 divisors, whose sum is σ = 2221230. Its totient is φ = 2221228.

The previous prime is 2221217. The next prime is 2221231. The reversal of 2221229 is 9221222.

2221229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2036329 + 184900 = 1427^2 + 430^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221229 - 2⁸ = 2220973 is a prime.

Together with 2221231, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2221229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221249) 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 as a sum of consecutive naturals, namely, 1110614 + 1110615.

It is an arithmetic number, because the mean of its divisors is an integer number (1110615).

2^2221229 is an apocalyptic number.

It is an amenable number.

2221229 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221229 is an equidigital number, since it uses as much as digits as its factorization.

2221229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

The square root of 2221229 is about 1490.3788109068. The cubic root of 2221229 is about 130.4761434741.

The spelling of 2221229 in words is "two million, two hundred twenty-one thousand, two hundred twenty-nine".