206513 has 4 divisors (see below), whose sum is σ = 208740. Its totient is φ = 204288.

The previous prime is 206501. The next prime is 206519. The reversal of 206513 is 315602.

206513 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.

It can be written as a sum of positive squares in 2 ways, for example, as 71824 + 134689 = 268^2 + 367^2 .

It is a cyclic number.

It is not a de Polignac number, because 206513 - 2¹⁴ = 190129 is a prime.

It is a super-3 number, since 3×206513³ = 26421863332343091, which contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 206491 and 206500.

It is not an unprimeable number, because it can be changed into a prime (206519) 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, 968 + ... + 1161.

It is an arithmetic number, because the mean of its divisors is an integer number (52185).

2²⁰⁶⁵¹³ is an apocalyptic number.

It is an amenable number.

206513 is a deficient number, since it is larger than the sum of its proper divisors (2227).

206513 is an equidigital number, since it uses as much as digits as its factorization.

206513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226.

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

The square root of 206513 is about 454.4370143375. The cubic root of 206513 is about 59.1083902377.

The spelling of 206513 in words is "two hundred six thousand, five hundred thirteen".