2181795 has 32 divisors (see below), whose sum is σ = 4354560. Its totient is φ = 906240.

The previous prime is 2181737. The next prime is 2181833. The reversal of 2181795 is 5971812.

It is not a de Polignac number, because 2181795 - 2⁶ = 2181731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211 + ... + 2099.

It is an arithmetic number, because the mean of its divisors is an integer number (136080).

2^2181795 is an apocalyptic number.

2181795 is a deficient number, since it is larger than the sum of its proper divisors (2172765).

2181795 is a wasteful number, since it uses less digits than its factorization.

2181795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1915.

The product of its digits is 5040, while the sum is 33.

The square root of 2181795 is about 1477.0900446486. The cubic root of 2181795 is about 129.6994040943.

It can be divided in two parts, 21817 and 95, that added together give a palindrome (21912).

The spelling of 2181795 in words is "two million, one hundred eighty-one thousand, seven hundred ninety-five".