220216566 has 16 divisors (see below), whose sum is σ = 440676288. Its totient is φ = 73365000.

The previous prime is 220216553. The next prime is 220216571. The reversal of 220216566 is 665612022.

220216566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2941 + ... + 21191.

It is an arithmetic number, because the mean of its divisors is an integer number (27542268).

Almost surely, 2^220216566 is an apocalyptic number.

220216566 is an abundant number, since it is smaller than the sum of its proper divisors (220459722).

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

220216566 is a wasteful number, since it uses less digits than its factorization.

220216566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20267.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 220216566 is about 14839.6956168245. The cubic root of 220216566 is about 603.8790947709.

Adding to 220216566 its reverse (665612022), we get a palindrome (885828588).

The spelling of 220216566 in words is "two hundred twenty million, two hundred sixteen thousand, five hundred sixty-six".