2543203109 has 2 divisors, whose sum is σ = 2543203110. Its totient is φ = 2543203108.

The previous prime is 2543203057. The next prime is 2543203123. The reversal of 2543203109 is 9013023452.

2543203109 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 can be written as a sum of positive squares in only one way, i.e., 2203833025 + 339370084 = 46945^2 + 18422^2 .

It is a cyclic number.

It is not a de Polignac number, because 2543203109 - 2²⁴ = 2526425893 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2543203609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271601554 + 1271601555.

It is an arithmetic number, because the mean of its divisors is an integer number (1271601555).

Almost surely, 2^2543203109 is an apocalyptic number.

It is an amenable number.

2543203109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543203109 is an equidigital number, since it uses as much as digits as its factorization.

2543203109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 2543203109 is about 50430.1805370554. The cubic root of 2543203109 is about 1364.9822856812.

The spelling of 2543203109 in words is "two billion, five hundred forty-three million, two hundred three thousand, one hundred nine".