222348221 has 2 divisors, whose sum is σ = 222348222. Its totient is φ = 222348220.

The previous prime is 222348173. The next prime is 222348223. The reversal of 222348221 is 122843222.

222348221 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., 221563225 + 784996 = 14885^2 + 886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222348221 is a prime.

Together with 222348223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222348223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111174110 + 111174111.

It is an arithmetic number, because the mean of its divisors is an integer number (111174111).

Almost surely, 2^222348221 is an apocalyptic number.

It is an amenable number.

222348221 is a deficient number, since it is larger than the sum of its proper divisors (1).

222348221 is an equidigital number, since it uses as much as digits as its factorization.

222348221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 26.

The square root of 222348221 is about 14911.3453786035. The cubic root of 222348221 is about 605.8213201350.

The spelling of 222348221 in words is "two hundred twenty-two million, three hundred forty-eight thousand, two hundred twenty-one".