204717530 has 16 divisors (see below), whose sum is σ = 372292200. Its totient is φ = 81042432.

The previous prime is 204717517. The next prime is 204717563. The reversal of 204717530 is 35717402.

It can be written as a sum of positive squares in 4 ways, for example, as 111999889 + 92717641 = 10583^2 + 9629^2 .

It is a junction number, because it is equal to n+sod(n) for n = 204717493 and 204717502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104555 + ... + 106494.

Almost surely, 2^204717530 is an apocalyptic number.

204717530 is a deficient number, since it is larger than the sum of its proper divisors (167574670).

204717530 is a wasteful number, since it uses less digits than its factorization.

204717530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211153.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 204717530 is about 14307.9533826470. The cubic root of 204717530 is about 589.3659088271.

The spelling of 204717530 in words is "two hundred four million, seven hundred seventeen thousand, five hundred thirty".