2181008 has 20 divisors (see below), whose sum is σ = 4249728. Its totient is φ = 1084320.

The previous prime is 2181007. The next prime is 2181017. The reversal of 2181008 is 8001812.

2181008 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2181007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4085 + ... + 4587.

2^2181008 is an apocalyptic number.

It is an amenable number.

2181008 is a deficient number, since it is larger than the sum of its proper divisors (2068720).

2181008 is a wasteful number, since it uses less digits than its factorization.

2181008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 776 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 2181008 is about 1476.8236184460. The cubic root of 2181008 is about 129.6838075012.

The spelling of 2181008 in words is "two million, one hundred eighty-one thousand, eight".