205345211 has 4 divisors (see below), whose sum is σ = 205803000. Its totient is φ = 204887424.

The previous prime is 205345199. The next prime is 205345213. The reversal of 205345211 is 112543502.

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-205345211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205345213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228221 + ... + 229118.

It is an arithmetic number, because the mean of its divisors is an integer number (51450750).

Almost surely, 2^205345211 is an apocalyptic number.

205345211 is a deficient number, since it is larger than the sum of its proper divisors (457789).

205345211 is an equidigital number, since it uses as much as digits as its factorization.

205345211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457788.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 205345211 is about 14329.8712834415. The cubic root of 205345211 is about 589.9676425805.

Adding to 205345211 its reverse (112543502), we get a palindrome (317888713).

The spelling of 205345211 in words is "two hundred five million, three hundred forty-five thousand, two hundred eleven".