6222440221 has 2 divisors, whose sum is σ = 6222440222. Its totient is φ = 6222440220.

The previous prime is 6222440209. The next prime is 6222440327. The reversal of 6222440221 is 1220442226.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4531174596 + 1691265625 = 67314^2 + 41125^2 .

It is a cyclic number.

It is not a de Polignac number, because 6222440221 - 2¹⁹ = 6221915933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6222440821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3111220110 + 3111220111.

It is an arithmetic number, because the mean of its divisors is an integer number (3111220111).

Almost surely, 2^6222440221 is an apocalyptic number.

It is an amenable number.

6222440221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6222440221 is an equidigital number, since it uses as much as digits as its factorization.

6222440221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 6222440221 is about 78882.4455820178. The cubic root of 6222440221 is about 1839.3042640782.

Adding to 6222440221 its reverse (1220442226), we get a palindrome (7442882447).

The spelling of 6222440221 in words is "six billion, two hundred twenty-two million, four hundred forty thousand, two hundred twenty-one".