2199448721 has 8 divisors (see below), whose sum is σ = 2347819200. Its totient is φ = 2054339280.

The previous prime is 2199448703. The next prime is 2199448793. The reversal of 2199448721 is 1278449912.

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

It is a de Polignac number, because none of the positive numbers 2^k-2199448721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2199448021) 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, 813866 + ... + 816563.

It is an arithmetic number, because the mean of its divisors is an integer number (293477400).

Almost surely, 2^2199448721 is an apocalyptic number.

It is an amenable number.

2199448721 is a deficient number, since it is larger than the sum of its proper divisors (148370479).

2199448721 is a wasteful number, since it uses less digits than its factorization.

2199448721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630519.

The product of its digits is 290304, while the sum is 47.

The square root of 2199448721 is about 46898.2805761576. The cubic root of 2199448721 is about 1300.4828031168.

The spelling of 2199448721 in words is "two billion, one hundred ninety-nine million, four hundred forty-eight thousand, seven hundred twenty-one".