2808448221 has 4 divisors (see below), whose sum is σ = 3744597632. Its totient is φ = 1872298812.

The previous prime is 2808448213. The next prime is 2808448249. The reversal of 2808448221 is 1228448082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2808448221 - 2³ = 2808448213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2808448221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2808448211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468074701 + ... + 468074706.

It is an arithmetic number, because the mean of its divisors is an integer number (936149408).

Almost surely, 2^2808448221 is an apocalyptic number.

It is an amenable number.

2808448221 is a deficient number, since it is larger than the sum of its proper divisors (936149411).

2808448221 is an equidigital number, since it uses as much as digits as its factorization.

2808448221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936149410.

The product of its (nonzero) digits is 65536, while the sum is 39.

The square root of 2808448221 is about 52994.7942820802. The cubic root of 2808448221 is about 1410.8758739938.

The spelling of 2808448221 in words is "two billion, eight hundred eight million, four hundred forty-eight thousand, two hundred twenty-one".