135506159 has 4 divisors (see below), whose sum is σ = 135599016. Its totient is φ = 135413304.

The previous prime is 135506153. The next prime is 135506209. The reversal of 135506159 is 951605531.

It is a happy number.

135506159 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135506159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135506153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44204 + ... + 47169.

It is an arithmetic number, because the mean of its divisors is an integer number (33899754).

Almost surely, 2^135506159 is an apocalyptic number.

135506159 is a deficient number, since it is larger than the sum of its proper divisors (92857).

135506159 is an equidigital number, since it uses as much as digits as its factorization.

135506159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92856.

The product of its (nonzero) digits is 20250, while the sum is 35.

The square root of 135506159 is about 11640.7112755192. The cubic root of 135506159 is about 513.6331101197.

The spelling of 135506159 in words is "one hundred thirty-five million, five hundred six thousand, one hundred fifty-nine".