206530816 has 18 divisors (see below), whose sum is σ = 412255382. Its totient is φ = 103265280.

The previous prime is 206530799. The next prime is 206530843. The reversal of 206530816 is 618035602.

It can be written as a sum of positive squares in only one way, i.e., 146313216 + 60217600 = 12096^2 + 7760^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 403125 + ... + 403636.

Almost surely, 2^206530816 is an apocalyptic number.

It is an amenable number.

206530816 is a deficient number, since it is larger than the sum of its proper divisors (205724566).

206530816 is an frugal number, since it uses more digits than its factorization.

206530816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806777 (or 806763 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 206530816 is about 14371.1800489730. The cubic root of 206530816 is about 591.1008996086.

The spelling of 206530816 in words is "two hundred six million, five hundred thirty thousand, eight hundred sixteen".