220110217 has 4 divisors (see below), whose sum is σ = 220154436. Its totient is φ = 220066000.

The previous prime is 220110173. The next prime is 220110221. The reversal of 220110217 is 712011022.

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

It can be written as a sum of positive squares in 2 ways, for example, as 149230656 + 70879561 = 12216^2 + 8419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220110217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220110217.

It is not an unprimeable number, because it can be changed into a prime (220110227) 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, 13534 + ... + 24967.

It is an arithmetic number, because the mean of its divisors is an integer number (55038609).

Almost surely, 2^220110217 is an apocalyptic number.

It is an amenable number.

220110217 is a deficient number, since it is larger than the sum of its proper divisors (44219).

220110217 is an equidigital number, since it uses as much as digits as its factorization.

220110217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44218.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 220110217 is about 14836.1119232769. Note that the first 3 decimals coincide. The cubic root of 220110217 is about 603.7818688446.

Adding to 220110217 its reverse (712011022), we get a palindrome (932121239).

The spelling of 220110217 in words is "two hundred twenty million, one hundred ten thousand, two hundred seventeen".