205051313 has 4 divisors (see below), whose sum is σ = 205081380. Its totient is φ = 205021248.

The previous prime is 205051303. The next prime is 205051321. The reversal of 205051313 is 313150502.

205051313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 198584464 + 6466849 = 14092^2 + 2543^2 .

It is a cyclic number.

It is not a de Polignac number, because 205051313 - 2¹⁶ = 204985777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205051303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653 + ... + 20261.

It is an arithmetic number, because the mean of its divisors is an integer number (51270345).

Almost surely, 2^205051313 is an apocalyptic number.

It is an amenable number.

205051313 is a deficient number, since it is larger than the sum of its proper divisors (30067).

205051313 is a wasteful number, since it uses less digits than its factorization.

205051313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30066.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 205051313 is about 14319.6128788456. The cubic root of 205051313 is about 589.6860466992.

The spelling of 205051313 in words is "two hundred five million, fifty-one thousand, three hundred thirteen".