63332221 has 2 divisors, whose sum is σ = 63332222. Its totient is φ = 63332220.

The previous prime is 63332189. The next prime is 63332231. The reversal of 63332221 is 12223336.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57972996 + 5359225 = 7614^2 + 2315^2 .

It is a cyclic number.

It is not a de Polignac number, because 63332221 - 2⁵ = 63332189 is a prime.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 63332192 and 63332201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63332231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31666110 + 31666111.

It is an arithmetic number, because the mean of its divisors is an integer number (31666111).

Almost surely, 2^63332221 is an apocalyptic number.

It is an amenable number.

63332221 is a deficient number, since it is larger than the sum of its proper divisors (1).

63332221 is an equidigital number, since it uses as much as digits as its factorization.

63332221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 22.

The square root of 63332221 is about 7958.1543714608. The cubic root of 63332221 is about 398.6039268682.

Adding to 63332221 its reverse (12223336), we get a palindrome (75555557).

It can be divided in two parts, 6 and 3332221, that multiplied together give a triangular number (19993326 = T₆₃₂₃).

The spelling of 63332221 in words is "sixty-three million, three hundred thirty-two thousand, two hundred twenty-one".