205111040 has 36 divisors (see below), whose sum is σ = 491308104. Its totient is φ = 82043904.

The previous prime is 205111037. The next prime is 205111043. The reversal of 205111040 is 40111502.

It is an interprime number because it is at equal distance from previous prime (205111037) and next prime (205111043).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205111043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78842 + ... + 81401.

Almost surely, 2^205111040 is an apocalyptic number.

205111040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205111040 is an abundant number, since it is smaller than the sum of its proper divisors (286197064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205111040 is an equidigital number, since it uses as much as digits as its factorization.

205111040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160264 (or 160250 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 205111040 is about 14321.6982233253. The cubic root of 205111040 is about 589.7432953929.

Adding to 205111040 its reverse (40111502), we get a palindrome (245222542).

The spelling of 205111040 in words is "two hundred five million, one hundred eleven thousand, forty".