2160081 has 32 divisors (see below), whose sum is σ = 3993600. Its totient is φ = 1121040.

The previous prime is 2160061. The next prime is 2160101. The reversal of 2160081 is 1800612.

2160081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

2160081 is a nontrivial binomial coefficient, being equal to C(2079, 2).

It is an interprime number because it is at equal distance from previous prime (2160061) and next prime (2160101).

It is not a de Polignac number, because 2160081 - 2⁶ = 2160017 is a prime.

It is a super-2 number, since 2×2160081² = 9331899853122, which contains 22 as substring.

2160081 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2160001) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1560 + ... + 2598.

It is an arithmetic number, because the mean of its divisors is an integer number (124800).

2^2160081 is an apocalyptic number.

2160081 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2160081 is the 2078-th triangular number.

It is an amenable number.

2160081 is a deficient number, since it is larger than the sum of its proper divisors (1833519).

2160081 is a wasteful number, since it uses less digits than its factorization.

2160081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066 (or 1060 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 2160081 is about 1469.7214021712. The cubic root of 2160081 is about 129.2676972077.

Adding to 2160081 its reverse (1800612), we get a palindrome (3960693).

The spelling of 2160081 in words is "two million, one hundred sixty thousand, eighty-one".