2218579289 has 6 divisors (see below), whose sum is σ = 2341492650. Its totient is φ = 2101811616.

The previous prime is 2218579283. The next prime is 2218579309. The reversal of 2218579289 is 9829758122.

It can be written as a sum of positive squares in only one way, i.e., 1640898064 + 577681225 = 40508^2 + 24035^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2218579289 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 2218579289.

It is not an unprimeable number, because it can be changed into a prime (2218579283) 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, 3072464 + ... + 3073185.

It is an arithmetic number, because the mean of its divisors is an integer number (390248775).

Almost surely, 2^2218579289 is an apocalyptic number.

It is an amenable number.

2218579289 is a deficient number, since it is larger than the sum of its proper divisors (122913361).

2218579289 is an equidigital number, since it uses as much as digits as its factorization.

2218579289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6145687 (or 6145668 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 53.

The square root of 2218579289 is about 47101.7970888585. The cubic root of 2218579289 is about 1304.2424103094.

The spelling of 2218579289 in words is "two billion, two hundred eighteen million, five hundred seventy-nine thousand, two hundred eighty-nine".