13287556571 has 2 divisors, whose sum is σ = 13287556572. Its totient is φ = 13287556570.

The previous prime is 13287556547. The next prime is 13287556589. The reversal of 13287556571 is 17565578231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13287556571 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (13287556591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6643778285 + 6643778286.

It is an arithmetic number, because the mean of its divisors is an integer number (6643778286).

Almost surely, 2^13287556571 is an apocalyptic number.

13287556571 is a deficient number, since it is larger than the sum of its proper divisors (1).

13287556571 is an equidigital number, since it uses as much as digits as its factorization.

13287556571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1764000, while the sum is 50.

The spelling of 13287556571 in words is "thirteen billion, two hundred eighty-seven million, five hundred fifty-six thousand, five hundred seventy-one".