205111072 has 12 divisors (see below), whose sum is σ = 403812486. Its totient is φ = 102555520.

The previous prime is 205111063. The next prime is 205111073. The reversal of 205111072 is 270111502.

205111072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 204947856 + 163216 = 14316^2 + 404^2 .

It is not an unprimeable number, because it can be changed into a prime (205111073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3204829 + ... + 3204892.

Almost surely, 2^205111072 is an apocalyptic number.

It is an amenable number.

205111072 is a deficient number, since it is larger than the sum of its proper divisors (198701414).

205111072 is an equidigital number, since it uses as much as digits as its factorization.

205111072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6409731 (or 6409723 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 205111072 is about 14321.6993405112. The cubic root of 205111072 is about 589.7433260621.

Adding to 205111072 its reverse (270111502), we get a palindrome (475222574).

The spelling of 205111072 in words is "two hundred five million, one hundred eleven thousand, seventy-two".