2220355217 has 6 divisors (see below), whose sum is σ = 2299560198. Its totient is φ = 2143790432.

The previous prime is 2220355177. The next prime is 2220355223. The reversal of 2220355217 is 7125530222.

2220355217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 37503376 + 2182851841 = 6124^2 + 46721^2 .

It is not a de Polignac number, because 2220355217 - 2²⁶ = 2153246353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

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 2220355217.

It is not an unprimeable number, because it can be changed into a prime (2226355217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1319228 + ... + 1320909.

It is an arithmetic number, because the mean of its divisors is an integer number (383260033).

Almost surely, 2^2220355217 is an apocalyptic number.

It is an amenable number.

2220355217 is a deficient number, since it is larger than the sum of its proper divisors (79204981).

2220355217 is an equidigital number, since it uses as much as digits as its factorization.

2220355217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640195 (or 2640166 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 2220355217 is about 47120.6453372617. The cubic root of 2220355217 is about 1304.5903240797.

Adding to 2220355217 its reverse (7125530222), we get a palindrome (9345885439).

The spelling of 2220355217 in words is "two billion, two hundred twenty million, three hundred fifty-five thousand, two hundred seventeen".