155170 has 16 divisors (see below), whose sum is σ = 285120. Its totient is φ = 60784.

The previous prime is 155167. The next prime is 155171. The reversal of 155170 is 71551.

155170 = T₄₁ + T₄₂ + ... + T₉₉.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155171) 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, 459 + ... + 721.

It is an arithmetic number, because the mean of its divisors is an integer number (17820).

2¹⁵⁵¹⁷⁰ is an apocalyptic number.

155170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155170 is a deficient number, since it is larger than the sum of its proper divisors (129950).

155170 is a wasteful number, since it uses less digits than its factorization.

155170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329.

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

The square root of 155170 is about 393.9162347505. The cubic root of 155170 is about 53.7364847938.

It can be divided in two parts, 155 and 170, that added together give a triangular number (325 = T₂₅).

The spelling of 155170 in words is "one hundred fifty-five thousand, one hundred seventy".