13431571 has 2 divisors, whose sum is σ = 13431572. Its totient is φ = 13431570.

The previous prime is 13431569. The next prime is 13431577. The reversal of 13431571 is 17513431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13431571 - 2¹ = 13431569 is a prime.

Together with 13431569, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13431577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6715785 + 6715786.

It is an arithmetic number, because the mean of its divisors is an integer number (6715786).

Almost surely, 2^13431571 is an apocalyptic number.

13431571 is a deficient number, since it is larger than the sum of its proper divisors (1).

13431571 is an equidigital number, since it uses as much as digits as its factorization.

13431571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 25.

The square root of 13431571 is about 3664.9107765401. The cubic root of 13431571 is about 237.7071640276.

The spelling of 13431571 in words is "thirteen million, four hundred thirty-one thousand, five hundred seventy-one".