135512165 has 4 divisors (see below), whose sum is σ = 162614604. Its totient is φ = 108409728.

The previous prime is 135512141. The next prime is 135512177. The reversal of 135512165 is 561215531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 561215531 = 2897 ⋅193723.

It can be written as a sum of positive squares in 2 ways, for example, as 28058209 + 107453956 = 5297^2 + 10366^2 .

It is a cyclic number.

It is not a de Polignac number, because 135512165 - 2¹⁴ = 135495781 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13551212 + ... + 13551221.

It is an arithmetic number, because the mean of its divisors is an integer number (40653651).

Almost surely, 2^135512165 is an apocalyptic number.

It is an amenable number.

135512165 is a deficient number, since it is larger than the sum of its proper divisors (27102439).

135512165 is an equidigital number, since it uses as much as digits as its factorization.

135512165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27102438.

The product of its digits is 4500, while the sum is 29.

The square root of 135512165 is about 11640.9692465877. The cubic root of 135512165 is about 513.6406985445.

Adding to 135512165 its reverse (561215531), we get a palindrome (696727696).

The spelling of 135512165 in words is "one hundred thirty-five million, five hundred twelve thousand, one hundred sixty-five".