205043313 has 8 divisors (see below), whose sum is σ = 274779648. Its totient is φ = 136001264.

The previous prime is 205043309. The next prime is 205043317. The reversal of 205043313 is 313340502.

205043313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (205043309) and next prime (205043317).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205043313 - 2² = 205043309 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 205043313.

It is not an unprimeable number, because it can be changed into a prime (205043317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172881 + ... + 174062.

It is an arithmetic number, because the mean of its divisors is an integer number (34347456).

Almost surely, 2^205043313 is an apocalyptic number.

It is an amenable number.

205043313 is a deficient number, since it is larger than the sum of its proper divisors (69736335).

205043313 is a wasteful number, since it uses less digits than its factorization.

205043313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347143.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 205043313 is about 14319.3335389605. Note that the first 3 decimals coincide. The cubic root of 205043313 is about 589.6783778062.

Adding to 205043313 its reverse (313340502), we get a palindrome (518383815).

The spelling of 205043313 in words is "two hundred five million, forty-three thousand, three hundred thirteen".