2105304305 has 16 divisors (see below), whose sum is σ = 2757977040. Its totient is φ = 1533385728.

The previous prime is 2105304301. The next prime is 2105304307. The reversal of 2105304305 is 5034035012.

It can be written as a sum of positive squares in 8 ways, for example, as 523174129 + 1582130176 = 22873^2 + 39776^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105304305 - 2² = 2105304301 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2105304301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217100 + ... + 226589.

It is an arithmetic number, because the mean of its divisors is an integer number (172373565).

Almost surely, 2^2105304305 is an apocalyptic number.

It is an amenable number.

2105304305 is a deficient number, since it is larger than the sum of its proper divisors (652672735).

2105304305 is a wasteful number, since it uses less digits than its factorization.

2105304305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443780.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 2105304305 is about 45883.5951621056. The cubic root of 2105304305 is about 1281.6564461689.

Adding to 2105304305 its reverse (5034035012), we get a palindrome (7139339317).

The spelling of 2105304305 in words is "two billion, one hundred five million, three hundred four thousand, three hundred five".