165403135 has 32 divisors (see below), whose sum is σ = 212926464. Its totient is φ = 123120000.

The previous prime is 165403127. The next prime is 165403171. The reversal of 165403135 is 531304561.

It is not a de Polignac number, because 165403135 - 2³ = 165403127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 865890 + ... + 866080.

It is an arithmetic number, because the mean of its divisors is an integer number (6653952).

Almost surely, 2^165403135 is an apocalyptic number.

165403135 is a deficient number, since it is larger than the sum of its proper divisors (47523329).

165403135 is a wasteful number, since it uses less digits than its factorization.

165403135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 165403135 is about 12860.9150141038. The cubic root of 165403135 is about 548.9269823472.

Adding to 165403135 its reverse (531304561), we get a palindrome (696707696).

The spelling of 165403135 in words is "one hundred sixty-five million, four hundred three thousand, one hundred thirty-five".