63221013 has 16 divisors (see below), whose sum is σ = 93974400. Its totient is φ = 42006240.

The previous prime is 63221009. The next prime is 63221029. The reversal of 63221013 is 31012236.

63221013 is a `hidden beast` number, since 632 + 21 + 0 + 13 = 666.

63221013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 63221013 - 2² = 63221009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63221033) 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 in 15 ways as a sum of consecutive naturals, for example, 4633 + ... + 12161.

It is an arithmetic number, because the mean of its divisors is an integer number (5873400).

Almost surely, 2^63221013 is an apocalyptic number.

It is an amenable number.

63221013 is a deficient number, since it is larger than the sum of its proper divisors (30753387).

63221013 is a wasteful number, since it uses less digits than its factorization.

63221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7849 (or 7843 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 63221013 is about 7951.1642543718. The cubic root of 63221013 is about 398.3704811015.

Adding to 63221013 its reverse (31012236), we get a palindrome (94233249).

The spelling of 63221013 in words is "sixty-three million, two hundred twenty-one thousand, thirteen".