205043132543 has 4 divisors (see below), whose sum is σ = 205123892520. Its totient is φ = 204962372568.

The previous prime is 205043132491. The next prime is 205043132551. The reversal of 205043132543 is 345231340502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205043132543 - 2¹⁶ = 205043067007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205043132573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40376180 + ... + 40381257.

It is an arithmetic number, because the mean of its divisors is an integer number (51280973130).

Almost surely, 2^205043132543 is an apocalyptic number.

205043132543 is a deficient number, since it is larger than the sum of its proper divisors (80759977).

205043132543 is an equidigital number, since it uses as much as digits as its factorization.

205043132543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80759976.

The product of its (nonzero) digits is 43200, while the sum is 32.

The spelling of 205043132543 in words is "two hundred five billion, forty-three million, one hundred thirty-two thousand, five hundred forty-three".