2218439609 has 2 divisors, whose sum is σ = 2218439610. Its totient is φ = 2218439608.

The previous prime is 2218439551. The next prime is 2218439669. The reversal of 2218439609 is 9069348122.

2218439609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1697687209 + 520752400 = 41203^2 + 22820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2218439609 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2218439609.

It is not a weakly prime, because it can be changed into another prime (2218439669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109219804 + 1109219805.

It is an arithmetic number, because the mean of its divisors is an integer number (1109219805).

Almost surely, 2^2218439609 is an apocalyptic number.

It is an amenable number.

2218439609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218439609 is an equidigital number, since it uses as much as digits as its factorization.

2218439609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 2218439609 is about 47100.3143195457. The cubic root of 2218439609 is about 1304.2150383775.

The spelling of 2218439609 in words is "two billion, two hundred eighteen million, four hundred thirty-nine thousand, six hundred nine".