171385135 has 4 divisors (see below), whose sum is σ = 205662168. Its totient is φ = 137108104.

The previous prime is 171385133. The next prime is 171385139. The reversal of 171385135 is 531583171.

171385135 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, and also an emirpimes, since its reverse is a distinct semiprime: 531583171 = 7 ⋅75940453.

It is a cyclic number.

It is not a de Polignac number, because 171385135 - 2¹ = 171385133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 171385135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171385133) 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, 17138509 + ... + 17138518.

It is an arithmetic number, because the mean of its divisors is an integer number (51415542).

Almost surely, 2^171385135 is an apocalyptic number.

171385135 is a deficient number, since it is larger than the sum of its proper divisors (34277033).

171385135 is an equidigital number, since it uses as much as digits as its factorization.

171385135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34277032.

The product of its digits is 12600, while the sum is 34.

The square root of 171385135 is about 13091.4145530573. The cubic root of 171385135 is about 555.4663018319.

The spelling of 171385135 in words is "one hundred seventy-one million, three hundred eighty-five thousand, one hundred thirty-five".