2006016221 has 4 divisors (see below), whose sum is σ = 2188381344. Its totient is φ = 1823651100.

The previous prime is 2006016209. The next prime is 2006016223. The reversal of 2006016221 is 1226106002.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 2006016221 - 2⁶ = 2006016157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2006016193 and 2006016202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2006016223) 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, 91182545 + ... + 91182566.

It is an arithmetic number, because the mean of its divisors is an integer number (547095336).

Almost surely, 2^2006016221 is an apocalyptic number.

It is an amenable number.

2006016221 is a deficient number, since it is larger than the sum of its proper divisors (182365123).

2006016221 is a wasteful number, since it uses less digits than its factorization.

2006016221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182365122.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 2006016221 is about 44788.5724376207. The cubic root of 2006016221 is about 1261.1831125114.

The spelling of 2006016221 in words is "two billion, six million, sixteen thousand, two hundred twenty-one".