220255217 has 32 divisors (see below), whose sum is σ = 282132480. Its totient is φ = 167261760.

The previous prime is 220255187. The next prime is 220255219. The reversal of 220255217 is 712552022.

220255217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 220255217 - 2¹⁴ = 220238833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220255219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 459584 + ... + 460062.

It is an arithmetic number, because the mean of its divisors is an integer number (8816640).

Almost surely, 2^220255217 is an apocalyptic number.

It is an amenable number.

220255217 is a deficient number, since it is larger than the sum of its proper divisors (61877263).

220255217 is a wasteful number, since it uses less digits than its factorization.

220255217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 220255217 is about 14840.9978438109. The cubic root of 220255217 is about 603.9144223667.

The spelling of 220255217 in words is "two hundred twenty million, two hundred fifty-five thousand, two hundred seventeen".