2161814 has 4 divisors (see below), whose sum is σ = 3242724. Its totient is φ = 1080906.

The previous prime is 2161813. The next prime is 2161823. The reversal of 2161814 is 4181612.

2161814 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2161814.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161813) 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 as a sum of consecutive naturals, namely, 540452 + ... + 540455.

It is an arithmetic number, because the mean of its divisors is an integer number (810681).

2^2161814 is an apocalyptic number.

2161814 is a deficient number, since it is larger than the sum of its proper divisors (1080910).

2161814 is a wasteful number, since it uses less digits than its factorization.

2161814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080909.

The product of its digits is 384, while the sum is 23.

The square root of 2161814 is about 1470.3108514869. The cubic root of 2161814 is about 129.3022578000.

The spelling of 2161814 in words is "two million, one hundred sixty-one thousand, eight hundred fourteen".