63332821 has 2 divisors, whose sum is σ = 63332822. Its totient is φ = 63332820.

The previous prime is 63332813. The next prime is 63332831. The reversal of 63332821 is 12823336.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63202500 + 130321 = 7950^2 + 361^2 .

It is a cyclic number.

It is not a de Polignac number, because 63332821 - 2³ = 63332813 is a prime.

It is a super-2 number, since 2×63332821² = 8022092431636082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 63332821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63332831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31666410 + 31666411.

It is an arithmetic number, because the mean of its divisors is an integer number (31666411).

Almost surely, 2^63332821 is an apocalyptic number.

It is an amenable number.

63332821 is a deficient number, since it is larger than the sum of its proper divisors (1).

63332821 is an equidigital number, since it uses as much as digits as its factorization.

63332821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 63332821 is about 7958.1920685543. The cubic root of 63332821 is about 398.6051856356.

The spelling of 63332821 in words is "sixty-three million, three hundred thirty-two thousand, eight hundred twenty-one".