2216047821 has 24 divisors (see below), whose sum is σ = 3205281600. Its totient is φ = 1361258496.

The previous prime is 2216047807. The next prime is 2216047837. The reversal of 2216047821 is 1287406122.

It is not a de Polignac number, because 2216047821 - 2⁷ = 2216047693 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216047891) 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 23 ways as a sum of consecutive naturals, for example, 300045 + ... + 307341.

It is an arithmetic number, because the mean of its divisors is an integer number (133553400).

Almost surely, 2^2216047821 is an apocalyptic number.

It is an amenable number.

2216047821 is a deficient number, since it is larger than the sum of its proper divisors (989233779).

2216047821 is a wasteful number, since it uses less digits than its factorization.

2216047821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7925 (or 7912 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 2216047821 is about 47074.9171109201. The cubic root of 2216047821 is about 1303.7461611256.

The spelling of 2216047821 in words is "two billion, two hundred sixteen million, forty-seven thousand, eight hundred twenty-one".