6442223 has 2 divisors, whose sum is σ = 6442224. Its totient is φ = 6442222.

The previous prime is 6442169. The next prime is 6442237. The reversal of 6442223 is 3222446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6442223 - 2¹⁰ = 6441199 is a prime.

It is a Sophie Germain prime.

It is a d-powerful number, because it can be written as 6 + 4 + 4¹¹ + 2 + 2¹⁷ + 2²¹ + 3⁹ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6442283) 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, 3221111 + 3221112.

It is an arithmetic number, because the mean of its divisors is an integer number (3221112).

Almost surely, 2^6442223 is an apocalyptic number.

6442223 is a deficient number, since it is larger than the sum of its proper divisors (1).

6442223 is an equidigital number, since it uses as much as digits as its factorization.

6442223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 23.

The square root of 6442223 is about 2538.1534626574. The cubic root of 6442223 is about 186.0709541604.

Adding to 6442223 its reverse (3222446), we get a palindrome (9664669).

The spelling of 6442223 in words is "six million, four hundred forty-two thousand, two hundred twenty-three".