3205765205 has 6 divisors (see below), whose sum is σ = 3847070178. Its totient is φ = 2564510880.

The previous prime is 3205765163. The next prime is 3205765207. The reversal of 3205765205 is 5025675023.

It can be written as a sum of positive squares in 3 ways, for example, as 1176352804 + 2029412401 = 34298^2 + 45049^2 .

It is not a de Polignac number, because 3205765205 - 2⁶ = 3205765141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3205765207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 113945 + ... + 139265.

It is an arithmetic number, because the mean of its divisors is an integer number (641178363).

Almost surely, 2^3205765205 is an apocalyptic number.

It is an amenable number.

3205765205 is a deficient number, since it is larger than the sum of its proper divisors (641304973).

3205765205 is an frugal number, since it uses more digits than its factorization.

3205765205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50647 (or 25326 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 35.

The square root of 3205765205 is about 56619.4772582722. The cubic root of 3205765205 is about 1474.4970350617.

The spelling of 3205765205 in words is "three billion, two hundred five million, seven hundred sixty-five thousand, two hundred five".