205045442443 has 4 divisors (see below), whose sum is σ = 205334646880. Its totient is φ = 204756238008.

The previous prime is 205045442431. The next prime is 205045442491. The reversal of 205045442443 is 344244540502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205045442443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205045442243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144601155 + ... + 144602572.

It is an arithmetic number, because the mean of its divisors is an integer number (51333661720).

Almost surely, 2^205045442443 is an apocalyptic number.

205045442443 is a deficient number, since it is larger than the sum of its proper divisors (289204437).

205045442443 is an equidigital number, since it uses as much as digits as its factorization.

205045442443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289204436.

The product of its (nonzero) digits is 307200, while the sum is 37.

Adding to 205045442443 its reverse (344244540502), we get a palindrome (549289982945).

The spelling of 205045442443 in words is "two hundred five billion, forty-five million, four hundred forty-two thousand, four hundred forty-three".