220216611 has 4 divisors (see below), whose sum is σ = 293622152. Its totient is φ = 146811072.

The previous prime is 220216597. The next prime is 220216639. The reversal of 220216611 is 116612022.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 220216611 - 2⁷ = 220216483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220216681) 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, 36702766 + ... + 36702771.

It is an arithmetic number, because the mean of its divisors is an integer number (73405538).

Almost surely, 2^220216611 is an apocalyptic number.

220216611 is a deficient number, since it is larger than the sum of its proper divisors (73405541).

220216611 is an equidigital number, since it uses as much as digits as its factorization.

220216611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73405540.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 220216611 is about 14839.6971330280. The cubic root of 220216611 is about 603.8791359040.

Adding to 220216611 its reverse (116612022), we get a palindrome (336828633).

The spelling of 220216611 in words is "two hundred twenty million, two hundred sixteen thousand, six hundred eleven".