63221538 has 16 divisors (see below), whose sum is σ = 133881120. Its totient is φ = 19834176.

The previous prime is 63221519. The next prime is 63221563. The reversal of 63221538 is 83512236.

63221538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 309808 + ... + 310011.

It is an arithmetic number, because the mean of its divisors is an integer number (8367570).

Almost surely, 2^63221538 is an apocalyptic number.

63221538 is an abundant number, since it is smaller than the sum of its proper divisors (70659582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63221538 is a wasteful number, since it uses less digits than its factorization.

63221538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619841.

The product of its digits is 8640, while the sum is 30.

The square root of 63221538 is about 7951.1972683364. The cubic root of 63221538 is about 398.3715838146.

The spelling of 63221538 in words is "sixty-three million, two hundred twenty-one thousand, five hundred thirty-eight".