180155 has 8 divisors (see below), whose sum is σ = 218592. Its totient is φ = 142528.

The previous prime is 180137. The next prime is 180161. The reversal of 180155 is 551081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 180155 - 2⁸ = 179899 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554 + ... + 816.

It is an arithmetic number, because the mean of its divisors is an integer number (27324).

2¹⁸⁰¹⁵⁵ is an apocalyptic number.

180155 is a deficient number, since it is larger than the sum of its proper divisors (38437).

180155 is a wasteful number, since it uses less digits than its factorization.

180155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 180155 is about 424.4466986560. The cubic root of 180155 is about 56.4783638148.

The spelling of 180155 in words is "one hundred eighty thousand, one hundred fifty-five".