2543555843 has 2 divisors, whose sum is σ = 2543555844. Its totient is φ = 2543555842.

The previous prime is 2543555801. The next prime is 2543555849. The reversal of 2543555843 is 3485553452.

2543555843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2543555843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2543555794 and 2543555803.

It is not a weakly prime, because it can be changed into another prime (2543555849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271777921 + 1271777922.

It is an arithmetic number, because the mean of its divisors is an integer number (1271777922).

Almost surely, 2^2543555843 is an apocalyptic number.

2543555843 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543555843 is an equidigital number, since it uses as much as digits as its factorization.

2543555843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440000, while the sum is 44.

The square root of 2543555843 is about 50433.6776668131. The cubic root of 2543555843 is about 1365.0453889651.

The spelling of 2543555843 in words is "two billion, five hundred forty-three million, five hundred fifty-five thousand, eight hundred forty-three".