63982221 has 4 divisors (see below), whose sum is σ = 85309632. Its totient is φ = 42654812.

The previous prime is 63982199. The next prime is 63982231. The reversal of 63982221 is 12228936.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63982221 - 2⁶ = 63982157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63982231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10663701 + ... + 10663706.

It is an arithmetic number, because the mean of its divisors is an integer number (21327408).

Almost surely, 2^63982221 is an apocalyptic number.

It is an amenable number.

63982221 is a deficient number, since it is larger than the sum of its proper divisors (21327411).

63982221 is a wasteful number, since it uses less digits than its factorization.

63982221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21327410.

The product of its digits is 10368, while the sum is 33.

The square root of 63982221 is about 7998.8887353182. Note that the first 3 decimals coincide. The cubic root of 63982221 is about 399.9629569863.

The spelling of 63982221 in words is "sixty-three million, nine hundred eighty-two thousand, two hundred twenty-one".