2143831 has 2 divisors, whose sum is σ = 2143832. Its totient is φ = 2143830.

The previous prime is 2143829. The next prime is 2143837. The reversal of 2143831 is 1383412.

2143831 = T₁₁₉₄ + T₁₁₉₅ + T₁₁₉₆.

2143831 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 2143831 - 2¹ = 2143829 is a prime.

It is a super-2 number, since 2×2143831² = 9192022713122, which contains 22 as substring.

Together with 2143829, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143837) 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, 1071915 + 1071916.

It is an arithmetic number, because the mean of its divisors is an integer number (1071916).

2^2143831 is an apocalyptic number.

2143831 is the 1196-th centered triangular number.

2143831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143831 is an equidigital number, since it uses as much as digits as its factorization.

2143831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 22.

The square root of 2143831 is about 1464.1827071783. The cubic root of 2143831 is about 128.9427264132.

The spelling of 2143831 in words is "two million, one hundred forty-three thousand, eight hundred thirty-one".