205111461 has 16 divisors (see below), whose sum is σ = 290563200. Its totient is φ = 128455488.

The previous prime is 205111457. The next prime is 205111481. The reversal of 205111461 is 164111502.

It is not a de Polignac number, because 205111461 - 2² = 205111457 is a prime.

It is a super-2 number, since 2×205111461² = 84141422867109042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205111411) 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, 28641 + ... + 35078.

It is an arithmetic number, because the mean of its divisors is an integer number (18160200).

Almost surely, 2^205111461 is an apocalyptic number.

It is an amenable number.

205111461 is a deficient number, since it is larger than the sum of its proper divisors (85451739).

205111461 is a wasteful number, since it uses less digits than its factorization.

205111461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63788.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 205111461 is about 14321.7129212954. The cubic root of 205111461 is about 589.7436988845.

Adding to 205111461 its reverse (164111502), we get a palindrome (369222963).

The spelling of 205111461 in words is "two hundred five million, one hundred eleven thousand, four hundred sixty-one".