2218173822 has 40 divisors (see below), whose sum is σ = 4999145976. Its totient is φ = 735108048.

The previous prime is 2218173803. The next prime is 2218173827. The reversal of 2218173822 is 2283718122.

2218173822 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218173827) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11548 + ... + 67599.

Almost surely, 2^2218173822 is an apocalyptic number.

2218173822 is an abundant number, since it is smaller than the sum of its proper divisors (2780972154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2218173822 is a wasteful number, since it uses less digits than its factorization.

2218173822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79334 (or 79325 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 2218173822 is about 47097.4927358134. The cubic root of 2218173822 is about 1304.1629511288.

The spelling of 2218173822 in words is "two billion, two hundred eighteen million, one hundred seventy-three thousand, eight hundred twenty-two".