2543745443 has 2 divisors, whose sum is σ = 2543745444. Its totient is φ = 2543745442.

The previous prime is 2543745437. The next prime is 2543745487. The reversal of 2543745443 is 3445473452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2543745443 - 2²⁰ = 2542696867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2543745443.

It is not a weakly prime, because it can be changed into another prime (2543745943) 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, 1271872721 + 1271872722.

It is an arithmetic number, because the mean of its divisors is an integer number (1271872722).

Almost surely, 2^2543745443 is an apocalyptic number.

2543745443 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543745443 is an equidigital number, since it uses as much as digits as its factorization.

2543745443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 806400, while the sum is 41.

The square root of 2543745443 is about 50435.5573281390. The cubic root of 2543745443 is about 1365.0793055490.

The spelling of 2543745443 in words is "two billion, five hundred forty-three million, seven hundred forty-five thousand, four hundred forty-three".