63380221 has 2 divisors, whose sum is σ = 63380222. Its totient is φ = 63380220.

The previous prime is 63380201. The next prime is 63380243. The reversal of 63380221 is 12208336.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59074596 + 4305625 = 7686^2 + 2075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63380221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63380201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31690110 + 31690111.

It is an arithmetic number, because the mean of its divisors is an integer number (31690111).

Almost surely, 2^63380221 is an apocalyptic number.

It is an amenable number.

63380221 is a deficient number, since it is larger than the sum of its proper divisors (1).

63380221 is an equidigital number, since it uses as much as digits as its factorization.

63380221 is an odious number, because the sum of its binary digits is odd.

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

The square root of 63380221 is about 7961.1695748803. The cubic root of 63380221 is about 398.7046031461.

Adding to 63380221 its reverse (12208336), we get a palindrome (75588557).

The spelling of 63380221 in words is "sixty-three million, three hundred eighty thousand, two hundred twenty-one".