205099135 has 24 divisors (see below), whose sum is σ = 265915440. Its totient is φ = 151337472.

The previous prime is 205099133. The next prime is 205099187. The reversal of 205099135 is 531990502.

It is a happy number.

It is not a de Polignac number, because 205099135 - 2¹ = 205099133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205099135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205099133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238336 + ... + 239194.

It is an arithmetic number, because the mean of its divisors is an integer number (11079810).

Almost surely, 2^205099135 is an apocalyptic number.

205099135 is a deficient number, since it is larger than the sum of its proper divisors (60816305).

205099135 is an equidigital number, since it uses as much as digits as its factorization.

205099135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987 (or 934 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 205099135 is about 14321.2825892097. The cubic root of 205099135 is about 589.7318852647.

The spelling of 205099135 in words is "two hundred five million, ninety-nine thousand, one hundred thirty-five".