2183983821 has 24 divisors (see below), whose sum is σ = 3282100224. Its totient is φ = 1397904480.

The previous prime is 2183983811. The next prime is 2183983849. The reversal of 2183983821 is 1283893812.

It is a happy number.

2183983821 is a `hidden beast` number, since 2 + 183 + 98 + 382 + 1 = 666.

It is not a de Polignac number, because 2183983821 - 2¹⁸ = 2183721677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2183983801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4615 + ... + 66251.

It is an arithmetic number, because the mean of its divisors is an integer number (136754176).

Almost surely, 2^2183983821 is an apocalyptic number.

It is an amenable number.

2183983821 is a deficient number, since it is larger than the sum of its proper divisors (1098116403).

2183983821 is a wasteful number, since it uses less digits than its factorization.

2183983821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61801 (or 61798 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 2183983821 is about 46733.1126825509. The cubic root of 2183983821 is about 1297.4276195604.

Subtracting from 2183983821 its reverse (1283893812), we obtain a palindrome (900090009).

The spelling of 2183983821 in words is "two billion, one hundred eighty-three million, nine hundred eighty-three thousand, eight hundred twenty-one".