2199929821 has 8 divisors (see below), whose sum is σ = 2279806200. Its totient is φ = 2120321280.

The previous prime is 2199929807. The next prime is 2199929861. The reversal of 2199929821 is 1289299912.

It can be written as a sum of positive squares in 4 ways, for example, as 409455225 + 1790474596 = 20235^2 + 42314^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2199929821 - 2⁵ = 2199929789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2199929861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50160 + ... + 83161.

It is an arithmetic number, because the mean of its divisors is an integer number (284975775).

Almost surely, 2^2199929821 is an apocalyptic number.

It is an amenable number.

2199929821 is a deficient number, since it is larger than the sum of its proper divisors (79876379).

2199929821 is a wasteful number, since it uses less digits than its factorization.

2199929821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133919.

The product of its digits is 419904, while the sum is 52.

The square root of 2199929821 is about 46903.4094816144. The cubic root of 2199929821 is about 1300.5776172790.

The spelling of 2199929821 in words is "two billion, one hundred ninety-nine million, nine hundred twenty-nine thousand, eight hundred twenty-one".