224221 has 2 divisors, whose sum is σ = 224222. Its totient is φ = 224220.

The previous prime is 224209. The next prime is 224233. The reversal of 224221 is 122422.

It is a balanced prime because it is at equal distance from previous prime (224209) and next prime (224233).

It can be written as a sum of positive squares in only one way, i.e., 151321 + 72900 = 389^2 + 270^2 .

It is a cyclic number.

It is not a de Polignac number, because 224221 - 2¹⁵ = 191453 is a prime.

It is a plaindrome in base 16.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112110 + 112111.

It is an arithmetic number, because the mean of its divisors is an integer number (112111).

2²²⁴²²¹ is an apocalyptic number.

It is an amenable number.

224221 is a deficient number, since it is larger than the sum of its proper divisors (1).

224221 is an equidigital number, since it uses as much as digits as its factorization.

224221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64, while the sum is 13.

The square root of 224221 is about 473.5197989525. The cubic root of 224221 is about 60.7517456751.

Adding to 224221 its reverse (122422), we get a palindrome (346643).

The spelling of 224221 in words is "two hundred twenty-four thousand, two hundred twenty-one", and thus it is an iban number.