205600013 has 4 divisors (see below), whose sum is σ = 214539168. Its totient is φ = 196660860.

The previous prime is 205600001. The next prime is 205600027. The reversal of 205600013 is 310006502.

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 205600013 - 2¹² = 205595917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205599964 and 205600000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205600033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4469543 + ... + 4469588.

It is an arithmetic number, because the mean of its divisors is an integer number (53634792).

Almost surely, 2^205600013 is an apocalyptic number.

205600013 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

205600013 is a deficient number, since it is larger than the sum of its proper divisors (8939155).

205600013 is an equidigital number, since it uses as much as digits as its factorization.

205600013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8939154.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 205600013 is about 14338.7591164647. The cubic root of 205600013 is about 590.2115615899.

Adding to 205600013 its reverse (310006502), we get a palindrome (515606515).

The spelling of 205600013 in words is "two hundred five million, six hundred thousand, thirteen".