205305011 has 4 divisors (see below), whose sum is σ = 205655352. Its totient is φ = 204954672.

The previous prime is 205304959. The next prime is 205305029. The reversal of 205305011 is 110503502.

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 205305011 - 2⁶ = 205304947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205305041) 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, 174290 + ... + 175463.

It is an arithmetic number, because the mean of its divisors is an integer number (51413838).

Almost surely, 2^205305011 is an apocalyptic number.

205305011 is a deficient number, since it is larger than the sum of its proper divisors (350341).

205305011 is an equidigital number, since it uses as much as digits as its factorization.

205305011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350340.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 205305011 is about 14328.4685504069. The cubic root of 205305011 is about 589.9291411598.

Adding to 205305011 its reverse (110503502), we get a palindrome (315808513).

The spelling of 205305011 in words is "two hundred five million, three hundred five thousand, eleven".