181330 has 8 divisors (see below), whose sum is σ = 326412. Its totient is φ = 72528.

The previous prime is 181303. The next prime is 181361. The reversal of 181330 is 33181.

181330 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 178929 + 2401 = 423^2 + 49^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9057 + ... + 9076.

2¹⁸¹³³⁰ is an apocalyptic number.

181330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181330 is a deficient number, since it is larger than the sum of its proper divisors (145082).

181330 is a wasteful number, since it uses less digits than its factorization.

181330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18140.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 181330 is about 425.8286040181. The cubic root of 181330 is about 56.6008848351.

The spelling of 181330 in words is "one hundred eighty-one thousand, three hundred thirty".