6363221 has 2 divisors, whose sum is σ = 6363222. Its totient is φ = 6363220.

The previous prime is 6363199. The next prime is 6363289. The reversal of 6363221 is 1223636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6195121 + 168100 = 2489^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 6363221 - 2¹⁸ = 6101077 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6363421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3181610 + 3181611.

It is an arithmetic number, because the mean of its divisors is an integer number (3181611).

Almost surely, 2^6363221 is an apocalyptic number.

It is an amenable number.

6363221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6363221 is an equidigital number, since it uses as much as digits as its factorization.

6363221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 23.

The square root of 6363221 is about 2522.5425665388. The cubic root of 6363221 is about 185.3072178092.

Adding to 6363221 its reverse (1223636), we get a palindrome (7586857).

The spelling of 6363221 in words is "six million, three hundred sixty-three thousand, two hundred twenty-one".