205320843 has 48 divisors (see below), whose sum is σ = 376836096. Its totient is φ = 104794560.

The previous prime is 205320827. The next prime is 205320847. The reversal of 205320843 is 348023502.

It is not a de Polignac number, because 205320843 - 2⁴ = 205320827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205320847) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21346 + ... + 29432.

It is an arithmetic number, because the mean of its divisors is an integer number (7850752).

Almost surely, 2^205320843 is an apocalyptic number.

205320843 is a deficient number, since it is larger than the sum of its proper divisors (171515253).

205320843 is a wasteful number, since it uses less digits than its factorization.

205320843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8144 (or 8141 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 205320843 is about 14329.0210063354. The cubic root of 205320843 is about 589.9443048068.

The spelling of 205320843 in words is "two hundred five million, three hundred twenty thousand, eight hundred forty-three".