2131823 has 2 divisors, whose sum is σ = 2131824. Its totient is φ = 2131822.

The previous prime is 2131813. The next prime is 2131837. The reversal of 2131823 is 3281312.

2131823 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2131823 - 2⁸ = 2131567 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2131795 and 2131804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131813) 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, 1065911 + 1065912.

It is an arithmetic number, because the mean of its divisors is an integer number (1065912).

2^2131823 is an apocalyptic number.

2131823 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131823 is an equidigital number, since it uses as much as digits as its factorization.

2131823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

The square root of 2131823 is about 1460.0763678657. The cubic root of 2131823 is about 128.7015313837.

The spelling of 2131823 in words is "two million, one hundred thirty-one thousand, eight hundred twenty-three".