63221065 has 4 divisors (see below), whose sum is σ = 75865284. Its totient is φ = 50576848.

The previous prime is 63221047. The next prime is 63221099. The reversal of 63221065 is 56012236.

63221065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17239104 + 45981961 = 4152^2 + 6781^2 .

It is a cyclic number.

It is not a de Polignac number, because 63221065 - 2⁵ = 63221033 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 6322102 + ... + 6322111.

It is an arithmetic number, because the mean of its divisors is an integer number (18966321).

Almost surely, 2^63221065 is an apocalyptic number.

It is an amenable number.

63221065 is a deficient number, since it is larger than the sum of its proper divisors (12644219).

63221065 is a wasteful number, since it uses less digits than its factorization.

63221065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12644218.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 63221065 is about 7951.1675243325. The cubic root of 63221065 is about 398.3705903229.

The spelling of 63221065 in words is "sixty-three million, two hundred twenty-one thousand, sixty-five".