181055 has 12 divisors (see below), whose sum is σ = 253080. Its totient is φ = 123984.

The previous prime is 181039. The next prime is 181061. The reversal of 181055 is 550181.

It is not a de Polignac number, because 181055 - 2⁴ = 181039 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125 + ... + 614.

It is an arithmetic number, because the mean of its divisors is an integer number (21090).

2¹⁸¹⁰⁵⁵ is an apocalyptic number.

181055 is a deficient number, since it is larger than the sum of its proper divisors (72025).

181055 is an equidigital number, since it uses as much as digits as its factorization.

181055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758 (or 751 counting only the distinct ones).

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

The square root of 181055 is about 425.5055816320. The cubic root of 181055 is about 56.5722572527.

It can be divided in two parts, 18105 and 5, that multiplied together give a triangular number (90525 = T₄₂₅).

The spelling of 181055 in words is "one hundred eighty-one thousand, fifty-five".