13571663243 has 2 divisors, whose sum is σ = 13571663244. Its totient is φ = 13571663242.

The previous prime is 13571663239. The next prime is 13571663249. The reversal of 13571663243 is 34236617531.

It is a weak prime.

It is an emirp because it is prime and its reverse (34236617531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13571663243 - 2² = 13571663239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13571663243.

It is not a weakly prime, because it can be changed into another prime (13571663249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6785831621 + 6785831622.

It is an arithmetic number, because the mean of its divisors is an integer number (6785831622).

Almost surely, 2^13571663243 is an apocalyptic number.

13571663243 is a deficient number, since it is larger than the sum of its proper divisors (1).

13571663243 is an equidigital number, since it uses as much as digits as its factorization.

13571663243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 41.

The spelling of 13571663243 in words is "thirteen billion, five hundred seventy-one million, six hundred sixty-three thousand, two hundred forty-three".