2181198874 has 16 divisors (see below), whose sum is σ = 3389921280. Its totient is φ = 1051487280.

The previous prime is 2181198871. The next prime is 2181198913. The reversal of 2181198874 is 4788911812.

It is not an unprimeable number, because it can be changed into a prime (2181198871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48714 + ... + 82069.

It is an arithmetic number, because the mean of its divisors is an integer number (211870080).

Almost surely, 2^2181198874 is an apocalyptic number.

2181198874 is a deficient number, since it is larger than the sum of its proper divisors (1208722406).

2181198874 is a wasteful number, since it uses less digits than its factorization.

2181198874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131085.

The product of its digits is 258048, while the sum is 49.

The square root of 2181198874 is about 46703.3068850590. The cubic root of 2181198874 is about 1296.8759054479.

The spelling of 2181198874 in words is "two billion, one hundred eighty-one million, one hundred ninety-eight thousand, eight hundred seventy-four".