205045343 has 4 divisors (see below), whose sum is σ = 205370928. Its totient is φ = 204719760.

The previous prime is 205045333. The next prime is 205045403. The reversal of 205045343 is 343540502.

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 205045343 - 2⁴ = 205045327 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 (205045333) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 161846 + ... + 163107.

It is an arithmetic number, because the mean of its divisors is an integer number (51342732).

Almost surely, 2^205045343 is an apocalyptic number.

205045343 is a deficient number, since it is larger than the sum of its proper divisors (325585).

205045343 is an equidigital number, since it uses as much as digits as its factorization.

205045343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325584.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 205045343 is about 14319.4044219723. The cubic root of 205045343 is about 589.6803238067.

Adding to 205045343 its reverse (343540502), we get a palindrome (548585845).

The spelling of 205045343 in words is "two hundred five million, forty-five thousand, three hundred forty-three".