2181016 has 16 divisors (see below), whose sum is σ = 4110840. Its totient is φ = 1084800.

The previous prime is 2181007. The next prime is 2181017. The reversal of 2181016 is 6101812.

2181016 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2180984 and 2181002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181017) 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, 1216 + ... + 2416.

2^2181016 is an apocalyptic number.

It is an amenable number.

2181016 is a deficient number, since it is larger than the sum of its proper divisors (1929824).

2181016 is a wasteful number, since it uses less digits than its factorization.

2181016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434 (or 1430 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 2181016 is about 1476.8263269593. The cubic root of 2181016 is about 129.6839660623.

Adding to 2181016 its reverse (6101812), we get a palindrome (8282828).

The spelling of 2181016 in words is "two million, one hundred eighty-one thousand, sixteen".