221983056 has 60 divisors (see below), whose sum is σ = 627093792. Its totient is φ = 73297728.

The previous prime is 221983039. The next prime is 221983057. The reversal of 221983056 is 650389122.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 221983056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221983057) 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 11 ways as a sum of consecutive naturals, for example, 8205 + ... + 22611.

Almost surely, 2^221983056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221983056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313546896).

221983056 is an abundant number, since it is smaller than the sum of its proper divisors (405110736).

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

221983056 is a wasteful number, since it uses less digits than its factorization.

221983056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14528 (or 14519 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 221983056 is about 14899.0958114914. The cubic root of 221983056 is about 605.4894893419.

The spelling of 221983056 in words is "two hundred twenty-one million, nine hundred eighty-three thousand, fifty-six".