422330221 has 2 divisors, whose sum is σ = 422330222. Its totient is φ = 422330220.

The previous prime is 422330191. The next prime is 422330231. The reversal of 422330221 is 122033224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 298252900 + 124077321 = 17270^2 + 11139^2 .

It is a cyclic number.

It is not a de Polignac number, because 422330221 - 2⁵ = 422330189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422330231) 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, 211165110 + 211165111.

It is an arithmetic number, because the mean of its divisors is an integer number (211165111).

Almost surely, 2^422330221 is an apocalyptic number.

It is an amenable number.

422330221 is a deficient number, since it is larger than the sum of its proper divisors (1).

422330221 is an equidigital number, since it uses as much as digits as its factorization.

422330221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 422330221 is about 20550.6744658174. The cubic root of 422330221 is about 750.2696636230.

Adding to 422330221 its reverse (122033224), we get a palindrome (544363445).

The spelling of 422330221 in words is "four hundred twenty-two million, three hundred thirty thousand, two hundred twenty-one".