205530530443 has 4 divisors (see below), whose sum is σ = 234892034800. Its totient is φ = 176169026088.

The previous prime is 205530530431. The next prime is 205530530477. The reversal of 205530530443 is 344035035502.

205530530443 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, and also an emirpimes, since its reverse is a distinct semiprime: 344035035502 = 2 ⋅172017517751.

It is a cyclic number.

It is not a de Polignac number, because 205530530443 - 2¹³ = 205530522251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205530530399 and 205530530408.

It is not an unprimeable number, because it can be changed into a prime (205530530243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14680752168 + ... + 14680752181.

It is an arithmetic number, because the mean of its divisors is an integer number (58723008700).

Almost surely, 2^205530530443 is an apocalyptic number.

205530530443 is a deficient number, since it is larger than the sum of its proper divisors (29361504357).

205530530443 is an equidigital number, since it uses as much as digits as its factorization.

205530530443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29361504356.

The product of its (nonzero) digits is 108000, while the sum is 34.

Adding to 205530530443 its reverse (344035035502), we get a palindrome (549565565945).

The spelling of 205530530443 in words is "two hundred five billion, five hundred thirty million, five hundred thirty thousand, four hundred forty-three".