206530817 has 8 divisors (see below), whose sum is σ = 222704160. Its totient is φ = 190887840.

The previous prime is 206530799. The next prime is 206530843. The reversal of 206530817 is 718035602.

It is a happy number.

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 206530817 - 2⁸ = 206530561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206530847) 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, 131783 + ... + 133340.

It is an arithmetic number, because the mean of its divisors is an integer number (27838020).

Almost surely, 2^206530817 is an apocalyptic number.

It is an amenable number.

206530817 is a deficient number, since it is larger than the sum of its proper divisors (16173343).

206530817 is a wasteful number, since it uses less digits than its factorization.

206530817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265183.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 206530817 is about 14371.1800837649. The cubic root of 206530817 is about 591.1009005626.

The spelling of 206530817 in words is "two hundred six million, five hundred thirty thousand, eight hundred seventeen".