265165135 has 4 divisors (see below), whose sum is σ = 318198168. Its totient is φ = 212132104.

The previous prime is 265165129. The next prime is 265165139. The reversal of 265165135 is 531561562.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 265165135 - 2¹⁹ = 264640847 is a prime.

It is a super-3 number, since 3×265165135³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 265165135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265165139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26516509 + ... + 26516518.

It is an arithmetic number, because the mean of its divisors is an integer number (79549542).

Almost surely, 2^265165135 is an apocalyptic number.

265165135 is a deficient number, since it is larger than the sum of its proper divisors (53033033).

265165135 is an equidigital number, since it uses as much as digits as its factorization.

265165135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53033032.

The product of its digits is 27000, while the sum is 34.

The square root of 265165135 is about 16283.8918873837. The cubic root of 265165135 is about 642.4492210572.

The spelling of 265165135 in words is "two hundred sixty-five million, one hundred sixty-five thousand, one hundred thirty-five".