2005216441 has 4 divisors (see below), whose sum is σ = 2005825012. Its totient is φ = 2004607872.

The previous prime is 2005216439. The next prime is 2005216457. The reversal of 2005216441 is 1446125002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1858903225 + 146313216 = 43115^2 + 12096^2 .

It is a cyclic number.

It is not a de Polignac number, because 2005216441 - 2¹ = 2005216439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005216141) 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, 299316 + ... + 305941.

It is an arithmetic number, because the mean of its divisors is an integer number (501456253).

Almost surely, 2^2005216441 is an apocalyptic number.

It is an amenable number.

2005216441 is a deficient number, since it is larger than the sum of its proper divisors (608571).

2005216441 is an equidigital number, since it uses as much as digits as its factorization.

2005216441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608570.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 2005216441 is about 44779.6431540047. The cubic root of 2005216441 is about 1261.0154829084.

The spelling of 2005216441 in words is "two billion, five million, two hundred sixteen thousand, four hundred forty-one".