2143442491 has 2 divisors, whose sum is σ = 2143442492. Its totient is φ = 2143442490.

The previous prime is 2143442489. The next prime is 2143442531. The reversal of 2143442491 is 1942443412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2143442491 - 2¹ = 2143442489 is a prime.

Together with 2143442489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2143442291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071721245 + 1071721246.

It is an arithmetic number, because the mean of its divisors is an integer number (1071721246).

Almost surely, 2^2143442491 is an apocalyptic number.

2143442491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143442491 is an equidigital number, since it uses as much as digits as its factorization.

2143442491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 34.

The square root of 2143442491 is about 46297.3270394739. The cubic root of 2143442491 is about 1289.3493686322.

The spelling of 2143442491 in words is "two billion, one hundred forty-three million, four hundred forty-two thousand, four hundred ninety-one".