2112823 has 4 divisors (see below), whose sum is σ = 2120328. Its totient is φ = 2105320.

The previous prime is 2112821. The next prime is 2112827. The reversal of 2112823 is 3282112.

2112823 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 a cyclic number.

It is not a de Polignac number, because 2112823 - 2¹ = 2112821 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2112823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112821) 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 3 ways as a sum of consecutive naturals, for example, 3313 + ... + 3898.

It is an arithmetic number, because the mean of its divisors is an integer number (530082).

2^2112823 is an apocalyptic number.

2112823 is a deficient number, since it is larger than the sum of its proper divisors (7505).

2112823 is an equidigital number, since it uses as much as digits as its factorization.

2112823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7504.

The product of its digits is 192, while the sum is 19.

The square root of 2112823 is about 1453.5552965058. Note that the first 3 decimals coincide. The cubic root of 2112823 is about 128.3180364444.

Adding to 2112823 its reverse (3282112), we get a palindrome (5394935).

The spelling of 2112823 in words is "two million, one hundred twelve thousand, eight hundred twenty-three".