63425281 has 2 divisors, whose sum is σ = 63425282. Its totient is φ = 63425280.

The previous prime is 63425269. The next prime is 63425309. The reversal of 63425281 is 18252436.

63425281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60217600 + 3207681 = 7760^2 + 1791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63425281 is a prime.

It is a super-2 number, since 2×63425281² = 8045532539857922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63425221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31712640 + 31712641.

It is an arithmetic number, because the mean of its divisors is an integer number (31712641).

Almost surely, 2^63425281 is an apocalyptic number.

It is an amenable number.

63425281 is a deficient number, since it is larger than the sum of its proper divisors (1).

63425281 is an equidigital number, since it uses as much as digits as its factorization.

63425281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 63425281 is about 7963.9990582621. Note that the first 3 decimals coincide. The cubic root of 63425281 is about 398.7990667568.

The spelling of 63425281 in words is "sixty-three million, four hundred twenty-five thousand, two hundred eighty-one".