2143420831 has 2 divisors, whose sum is σ = 2143420832. Its totient is φ = 2143420830.

The previous prime is 2143420819. The next prime is 2143420849. The reversal of 2143420831 is 1380243412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2143420831 - 2⁷ = 2143420703 is a prime.

It is a super-2 number, since 2×2143420831² = 9188505717529461122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2143420831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143420891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071710415 + 1071710416.

It is an arithmetic number, because the mean of its divisors is an integer number (1071710416).

Almost surely, 2^2143420831 is an apocalyptic number.

2143420831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143420831 is an equidigital number, since it uses as much as digits as its factorization.

2143420831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 2143420831 is about 46297.0931160910. The cubic root of 2143420831 is about 1289.3450255561.

The spelling of 2143420831 in words is "two billion, one hundred forty-three million, four hundred twenty thousand, eight hundred thirty-one".