165135109 has 8 divisors (see below), whose sum is σ = 172029440. Its totient is φ = 158338800.

The previous prime is 165135083. The next prime is 165135151. The reversal of 165135109 is 901531561.

165135109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165135109 - 2¹⁹ = 164610821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165135199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21057 + ... + 27814.

It is an arithmetic number, because the mean of its divisors is an integer number (21503680).

Almost surely, 2^165135109 is an apocalyptic number.

It is an amenable number.

165135109 is a deficient number, since it is larger than the sum of its proper divisors (6894331).

165135109 is a wasteful number, since it uses less digits than its factorization.

165135109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49011.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 165135109 is about 12850.4906132023. The cubic root of 165135109 is about 548.6303208097.

The spelling of 165135109 in words is "one hundred sixty-five million, one hundred thirty-five thousand, one hundred nine".