63425221 has 2 divisors, whose sum is σ = 63425222. Its totient is φ = 63425220.

The previous prime is 63425209. The next prime is 63425239. The reversal of 63425221 is 12252436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57972996 + 5452225 = 7614^2 + 2335^2 .

It is a cyclic number.

It is not a de Polignac number, because 63425221 - 2⁵ = 63425189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63425251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31712610 + 31712611.

It is an arithmetic number, because the mean of its divisors is an integer number (31712611).

Almost surely, 2^63425221 is an apocalyptic number.

It is an amenable number.

63425221 is a deficient number, since it is larger than the sum of its proper divisors (1).

63425221 is an equidigital number, since it uses as much as digits as its factorization.

63425221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 25.

The square root of 63425221 is about 7963.9952913095. The cubic root of 63425221 is about 398.7989410028.

Adding to 63425221 its reverse (12252436), we get a palindrome (75677657).

The spelling of 63425221 in words is "sixty-three million, four hundred twenty-five thousand, two hundred twenty-one".