2218744919 has 4 divisors (see below), whose sum is σ = 2349259344. Its totient is φ = 2088230496.

The previous prime is 2218744909. The next prime is 2218744921. The reversal of 2218744919 is 9194478122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9194478122 = 2 ⋅4597239061.

It is not a de Polignac number, because 2218744919 - 2²⁸ = 1950309463 is a prime.

It is a super-2 number, since 2×2218744919² = 9845658031176633122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218744909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65257187 + ... + 65257220.

It is an arithmetic number, because the mean of its divisors is an integer number (587314836).

Almost surely, 2^2218744919 is an apocalyptic number.

2218744919 is a deficient number, since it is larger than the sum of its proper divisors (130514425).

2218744919 is a wasteful number, since it uses less digits than its factorization.

2218744919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130514424.

The product of its digits is 290304, while the sum is 47.

The square root of 2218744919 is about 47103.5552692151. Note that the first 3 decimals coincide. The cubic root of 2218744919 is about 1304.2748659588.

The spelling of 2218744919 in words is "two billion, two hundred eighteen million, seven hundred forty-four thousand, nine hundred nineteen".