165135423 has 16 divisors (see below), whose sum is σ = 230121216. Its totient is φ = 105135360.

The previous prime is 165135407. The next prime is 165135431. The reversal of 165135423 is 324531561.

It is not a de Polignac number, because 165135423 - 2⁴ = 165135407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165135493) 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 15 ways as a sum of consecutive naturals, for example, 52783 + ... + 55823.

It is an arithmetic number, because the mean of its divisors is an integer number (14382576).

Almost surely, 2^165135423 is an apocalyptic number.

165135423 is a deficient number, since it is larger than the sum of its proper divisors (64985793).

165135423 is a wasteful number, since it uses less digits than its factorization.

165135423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3854.

The product of its digits is 10800, while the sum is 30.

The square root of 165135423 is about 12850.5028306288. The cubic root of 165135423 is about 548.6306685447.

Adding to 165135423 its reverse (324531561), we get a palindrome (489666984).

The spelling of 165135423 in words is "one hundred sixty-five million, one hundred thirty-five thousand, four hundred twenty-three".