2543686213 has 2 divisors, whose sum is σ = 2543686214. Its totient is φ = 2543686212.

The previous prime is 2543686169. The next prime is 2543686247. The reversal of 2543686213 is 3126863452.

2543686213 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., 2331634369 + 212051844 = 48287^2 + 14562^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2543686213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2543686253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271843106 + 1271843107.

It is an arithmetic number, because the mean of its divisors is an integer number (1271843107).

Almost surely, 2^2543686213 is an apocalyptic number.

It is an amenable number.

2543686213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543686213 is an equidigital number, since it uses as much as digits as its factorization.

2543686213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 40.

The square root of 2543686213 is about 50434.9701397750. The cubic root of 2543686213 is about 1365.0687103752.

The spelling of 2543686213 in words is "two billion, five hundred forty-three million, six hundred eighty-six thousand, two hundred thirteen".