205320355 has 4 divisors (see below), whose sum is σ = 246384432. Its totient is φ = 164256280.

The previous prime is 205320343. The next prime is 205320389. The reversal of 205320355 is 553023502.

205320355 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-205320355 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20532031 + ... + 20532040.

It is an arithmetic number, because the mean of its divisors is an integer number (61596108).

Almost surely, 2^205320355 is an apocalyptic number.

205320355 is a deficient number, since it is larger than the sum of its proper divisors (41064077).

205320355 is an equidigital number, since it uses as much as digits as its factorization.

205320355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41064076.

The product of its (nonzero) digits is 4500, while the sum is 25.

The square root of 205320355 is about 14329.0039779463. The cubic root of 205320355 is about 589.9438374195.

Adding to 205320355 its reverse (553023502), we get a palindrome (758343857).

The spelling of 205320355 in words is "two hundred five million, three hundred twenty thousand, three hundred fifty-five".