2543686141 has 2 divisors, whose sum is σ = 2543686142. Its totient is φ = 2543686140.

The previous prime is 2543686139. The next prime is 2543686147. The reversal of 2543686141 is 1416863452.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1301405625 + 1242280516 = 36075^2 + 35246^2 .

It is a cyclic number.

It is not a de Polignac number, because 2543686141 - 2¹ = 2543686139 is a prime.

Together with 2543686139, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2543686094 and 2543686103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2543686147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1271843070 + 1271843071.

It is an arithmetic number, because the mean of its divisors is an integer number (1271843071).

Almost surely, 2^2543686141 is an apocalyptic number.

It is an amenable number.

2543686141 is a deficient number, since it is larger than the sum of its proper divisors (1).

2543686141 is an equidigital number, since it uses as much as digits as its factorization.

2543686141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 40.

The square root of 2543686141 is about 50434.9694259846. The cubic root of 2543686141 is about 1365.0686974956.

The spelling of 2543686141 in words is "two billion, five hundred forty-three million, six hundred eighty-six thousand, one hundred forty-one".