223214221 has 2 divisors, whose sum is σ = 223214222. Its totient is φ = 223214220.

The previous prime is 223214207. The next prime is 223214227. The reversal of 223214221 is 122412322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197711721 + 25502500 = 14061^2 + 5050^2 .

It is a cyclic number.

It is not a de Polignac number, because 223214221 - 2⁹ = 223213709 is a prime.

It is a super-3 number, since 3×223214221³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223214227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111607110 + 111607111.

It is an arithmetic number, because the mean of its divisors is an integer number (111607111).

Almost surely, 2^223214221 is an apocalyptic number.

It is an amenable number.

223214221 is a deficient number, since it is larger than the sum of its proper divisors (1).

223214221 is an equidigital number, since it uses as much as digits as its factorization.

223214221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 19.

The square root of 223214221 is about 14940.3554509255. The cubic root of 223214221 is about 606.6068171782.

Adding to 223214221 its reverse (122412322), we get a palindrome (345626543).

The spelling of 223214221 in words is "two hundred twenty-three million, two hundred fourteen thousand, two hundred twenty-one".