2218812939 has 32 divisors (see below), whose sum is σ = 3886272000. Its totient is φ = 1224169632.

The previous prime is 2218812931. The next prime is 2218812979. The reversal of 2218812939 is 9392188122.

It is a happy number.

It is not a de Polignac number, because 2218812939 - 2³ = 2218812931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2218812894 and 2218812903.

It is not an unprimeable number, because it can be changed into a prime (2218812931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 196929 + ... + 207890.

It is an arithmetic number, because the mean of its divisors is an integer number (121446000).

Almost surely, 2^2218812939 is an apocalyptic number.

2218812939 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2218812939 is a deficient number, since it is larger than the sum of its proper divisors (1667459061).

2218812939 is a wasteful number, since it uses less digits than its factorization.

2218812939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404864 (or 404858 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 2218812939 is about 47104.2772898598. The cubic root of 2218812939 is about 1304.2881941951.

The spelling of 2218812939 in words is "two billion, two hundred eighteen million, eight hundred twelve thousand, nine hundred thirty-nine".