2218312843 has 2 divisors, whose sum is σ = 2218312844. Its totient is φ = 2218312842.

The previous prime is 2218312801. The next prime is 2218312879. The reversal of 2218312843 is 3482138122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2218312843 - 2¹³ = 2218304651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2218312799 and 2218312808.

It is not a weakly prime, because it can be changed into another prime (2218312543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109156421 + 1109156422.

It is an arithmetic number, because the mean of its divisors is an integer number (1109156422).

Almost surely, 2^2218312843 is an apocalyptic number.

2218312843 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218312843 is an equidigital number, since it uses as much as digits as its factorization.

2218312843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 34.

The square root of 2218312843 is about 47098.9685980489. The cubic root of 2218312843 is about 1304.1901961007.

The spelling of 2218312843 in words is "two billion, two hundred eighteen million, three hundred twelve thousand, eight hundred forty-three".