30081 has 8 divisors (see below), whose sum is σ = 41344. Its totient is φ = 19440.

The previous prime is 30071. The next prime is 30089. The reversal of 30081 is 18003.

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

It is not a de Polignac number, because 30081 - 2⁹ = 29569 is a prime.

It is a super-2 number, since 2×30081² = 1809733122, which contains 22 as substring.

It is a Duffinian number.

30081 is a modest number, since divided by 81 gives 30 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30089) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 25 + ... + 246.

It is an arithmetic number, because the mean of its divisors is an integer number (5168).

2³⁰⁰⁸¹ is an apocalyptic number.

It is an amenable number.

30081 is a deficient number, since it is larger than the sum of its proper divisors (11263).

30081 is a wasteful number, since it uses less digits than its factorization.

30081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 30081 is about 173.4387499955. The cubic root of 30081 is about 31.1002650212.

Adding to 30081 its reverse (18003), we get a palindrome (48084).

The spelling of 30081 in words is "thirty thousand, eighty-one".