63221745 has 16 divisors (see below), whose sum is σ = 102870720. Its totient is φ = 33146304.

The previous prime is 63221731. The next prime is 63221813. The reversal of 63221745 is 54712236.

It is not a de Polignac number, because 63221745 - 2⁹ = 63221233 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34834 + ... + 36603.

It is an arithmetic number, because the mean of its divisors is an integer number (6429420).

Almost surely, 2^63221745 is an apocalyptic number.

It is an amenable number.

63221745 is a deficient number, since it is larger than the sum of its proper divisors (39648975).

63221745 is a wasteful number, since it uses less digits than its factorization.

63221745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71504.

The product of its digits is 10080, while the sum is 30.

The square root of 63221745 is about 7951.2102852333. The cubic root of 63221745 is about 398.3720185970.

The spelling of 63221745 in words is "sixty-three million, two hundred twenty-one thousand, seven hundred forty-five".