2218389863 has 2 divisors, whose sum is σ = 2218389864. Its totient is φ = 2218389862.

The previous prime is 2218389851. The next prime is 2218389893. The reversal of 2218389863 is 3689838122.

2218389863 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 is a cyclic number.

It is not a de Polignac number, because 2218389863 - 2⁴ = 2218389847 is a prime.

It is a super-2 number, since 2×2218389863² = 9842507168522317538, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2218389893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109194931 + 1109194932.

It is an arithmetic number, because the mean of its divisors is an integer number (1109194932).

Almost surely, 2^2218389863 is an apocalyptic number.

2218389863 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218389863 is an equidigital number, since it uses as much as digits as its factorization.

2218389863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 50.

The square root of 2218389863 is about 47099.7862309374. The cubic root of 2218389863 is about 1304.2052897888.

The spelling of 2218389863 in words is "two billion, two hundred eighteen million, three hundred eighty-nine thousand, eight hundred sixty-three".