2180823 has 4 divisors (see below), whose sum is σ = 2907768. Its totient is φ = 1453880.

The previous prime is 2180813. The next prime is 2180833. The reversal of 2180823 is 3280812.

2180823 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 interprime number because it is at equal distance from previous prime (2180813) and next prime (2180833).

It is a cyclic number.

It is not a de Polignac number, because 2180823 - 2⁴ = 2180807 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 2180793 and 2180802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180803) 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, 363468 + ... + 363473.

It is an arithmetic number, because the mean of its divisors is an integer number (726942).

2^2180823 is an apocalyptic number.

2180823 is a deficient number, since it is larger than the sum of its proper divisors (726945).

2180823 is an equidigital number, since it uses as much as digits as its factorization.

2180823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726944.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 2180823 is about 1476.7609826915. The cubic root of 2180823 is about 129.6801406672.

It can be divided in two parts, 2180 and 823, that added together give a palindrome (3003).

The spelling of 2180823 in words is "two million, one hundred eighty thousand, eight hundred twenty-three".