63216530 has 16 divisors (see below), whose sum is σ = 122543064. Its totient is φ = 23341440.

The previous prime is 63216499. The next prime is 63216541. The reversal of 63216530 is 3561236.

63216530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 21446161 + 41770369 = 4631^2 + 6463^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 63216530.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 243011 + ... + 243270.

Almost surely, 2^63216530 is an apocalyptic number.

63216530 is a deficient number, since it is larger than the sum of its proper divisors (59326534).

63216530 is a wasteful number, since it uses less digits than its factorization.

63216530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486301.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 63216530 is about 7950.8823409732. The cubic root of 63216530 is about 398.3610647329.

Adding to 63216530 its reverse (3561236), we get a palindrome (66777766).

The spelling of 63216530 in words is "sixty-three million, two hundred sixteen thousand, five hundred thirty".