170155 has 4 divisors (see below), whose sum is σ = 204192. Its totient is φ = 136120.

The previous prime is 170141. The next prime is 170167. The reversal of 170155 is 551071.

170155 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: 551071 = 349 ⋅1579.

It is not a de Polignac number, because 170155 - 2⁵ = 170123 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17011 + ... + 17020.

It is an arithmetic number, because the mean of its divisors is an integer number (51048).

2¹⁷⁰¹⁵⁵ is an apocalyptic number.

170155 is a deficient number, since it is larger than the sum of its proper divisors (34037).

170155 is an equidigital number, since it uses as much as digits as its factorization.

170155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34036.

The product of its (nonzero) digits is 175, while the sum is 19.

The square root of 170155 is about 412.4984848457. The cubic root of 170155 is about 55.4134136695.

It can be divided in two parts, 17015 and 5, that added together give a triangular number (17020 = T₁₈₄).

The spelling of 170155 in words is "one hundred seventy thousand, one hundred fifty-five".