205320345 has 16 divisors (see below), whose sum is σ = 328713792. Its totient is φ = 109437120.

The previous prime is 205320343. The next prime is 205320389. The reversal of 205320345 is 543023502.

205320345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 205320345 - 2¹ = 205320343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205320341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30234 + ... + 36396.

It is an arithmetic number, because the mean of its divisors is an integer number (20544612).

Almost surely, 2^205320345 is an apocalyptic number.

It is an amenable number.

205320345 is a deficient number, since it is larger than the sum of its proper divisors (123393447).

205320345 is a wasteful number, since it uses less digits than its factorization.

205320345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8392.

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 205320345 is about 14329.0036290037. The cubic root of 205320345 is about 589.9438278419.

Adding to 205320345 its reverse (543023502), we get a palindrome (748343847).

The spelling of 205320345 in words is "two hundred five million, three hundred twenty thousand, three hundred forty-five".