6338221 has 2 divisors, whose sum is σ = 6338222. Its totient is φ = 6338220.

The previous prime is 6338209. The next prime is 6338239. The reversal of 6338221 is 1228336.

6338221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6325225 + 12996 = 2515^2 + 114^2 .

It is a cyclic number.

It is not a de Polignac number, because 6338221 - 2¹³ = 6330029 is a prime.

It is a d-powerful number, because it can be written as 6⁶ + 3³ + 3⁴ + 8⁷ + 2²¹ + 2²¹ + 1 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6338281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3169110 + 3169111.

It is an arithmetic number, because the mean of its divisors is an integer number (3169111).

Almost surely, 2^6338221 is an apocalyptic number.

It is an amenable number.

6338221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6338221 is an equidigital number, since it uses as much as digits as its factorization.

6338221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 25.

The square root of 6338221 is about 2517.5823720387. The cubic root of 6338221 is about 185.0642192438.

The spelling of 6338221 in words is "six million, three hundred thirty-eight thousand, two hundred twenty-one".