2198219821 has 12 divisors (see below), whose sum is σ = 2557941120. Its totient is φ = 1883578200.

The previous prime is 2198219819. The next prime is 2198219843. The reversal of 2198219821 is 1289128912.

It is not a de Polignac number, because 2198219821 - 2¹ = 2198219819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2198219861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213060 + ... + 223138.

It is an arithmetic number, because the mean of its divisors is an integer number (213161760).

Almost surely, 2^2198219821 is an apocalyptic number.

It is an amenable number.

2198219821 is a deficient number, since it is larger than the sum of its proper divisors (359721299).

2198219821 is a wasteful number, since it uses less digits than its factorization.

2198219821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14544 (or 14537 counting only the distinct ones).

The product of its digits is 41472, while the sum is 43.

The square root of 2198219821 is about 46885.1769859089. The cubic root of 2198219821 is about 1300.2405513437.

Subtracting from 2198219821 its reverse (1289128912), we obtain a palindrome (909090909).

The spelling of 2198219821 in words is "two billion, one hundred ninety-eight million, two hundred nineteen thousand, eight hundred twenty-one".