220543616 has 32 divisors (see below), whose sum is σ = 444679200. Its totient is φ = 108937984.

The previous prime is 220543607. The next prime is 220543639. The reversal of 220543616 is 616345022.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245 + ... + 21003.

It is an arithmetic number, because the mean of its divisors is an integer number (13896225).

Almost surely, 2^220543616 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 220543616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222339600).

220543616 is an abundant number, since it is smaller than the sum of its proper divisors (224135584).

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

220543616 is an equidigital number, since it uses as much as digits as its factorization.

220543616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20856 (or 20844 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 220543616 is about 14850.7109594120. The cubic root of 220543616 is about 604.1778930127.

Adding to 220543616 its reverse (616345022), we get a palindrome (836888638).

The spelling of 220543616 in words is "two hundred twenty million, five hundred forty-three thousand, six hundred sixteen".