3205105613 has 4 divisors (see below), whose sum is σ = 3205389408. Its totient is φ = 3204821820.

The previous prime is 3205105571. The next prime is 3205105711. The reversal of 3205105613 is 3165015023.

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 3205105613 - 2¹⁰ = 3205104589 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 (3205105213) 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, 124223 + ... + 147788.

It is an arithmetic number, because the mean of its divisors is an integer number (801347352).

Almost surely, 2^3205105613 is an apocalyptic number.

It is an amenable number.

3205105613 is a deficient number, since it is larger than the sum of its proper divisors (283795).

3205105613 is a wasteful number, since it uses less digits than its factorization.

3205105613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283794.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 3205105613 is about 56613.6521786044. The cubic root of 3205105613 is about 1474.3959013130.

The spelling of 3205105613 in words is "three billion, two hundred five million, one hundred five thousand, six hundred thirteen".