205992530 has 16 divisors (see below), whose sum is σ = 374459544. Its totient is φ = 81580800.

The previous prime is 205992517. The next prime is 205992533. The reversal of 205992530 is 35299502.

It can be written as a sum of positive squares in 4 ways, for example, as 204118369 + 1874161 = 14287^2 + 1369^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (205992533) 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, 100967 + ... + 102986.

Almost surely, 2^205992530 is an apocalyptic number.

205992530 is a deficient number, since it is larger than the sum of its proper divisors (168467014).

205992530 is a wasteful number, since it uses less digits than its factorization.

205992530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204061.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 205992530 is about 14352.4398622673. The cubic root of 205992530 is about 590.5869195422.

The spelling of 205992530 in words is "two hundred five million, nine hundred ninety-two thousand, five hundred thirty".