205135315 has 48 divisors (see below), whose sum is σ = 315843840. Its totient is φ = 126463680.

The previous prime is 205135313. The next prime is 205135351. The reversal of 205135315 is 513531502.

It is not a de Polignac number, because 205135315 - 2¹ = 205135313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205135315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205135313) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 277216 + ... + 277954.

It is an arithmetic number, because the mean of its divisors is an integer number (6580080).

Almost surely, 2^205135315 is an apocalyptic number.

205135315 is a deficient number, since it is larger than the sum of its proper divisors (110708525).

205135315 is a wasteful number, since it uses less digits than its factorization.

205135315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872 (or 865 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 205135315 is about 14322.5456885290. The cubic root of 205135315 is about 589.7665599520.

Adding to 205135315 its reverse (513531502), we get a palindrome (718666817).

The spelling of 205135315 in words is "two hundred five million, one hundred thirty-five thousand, three hundred fifteen".