71328571 has 2 divisors, whose sum is σ = 71328572. Its totient is φ = 71328570.

The previous prime is 71328559. The next prime is 71328577. The reversal of 71328571 is 17582317.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71328571 - 2¹¹ = 71326523 is a prime.

It is not a weakly prime, because it can be changed into another prime (71328577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35664285 + 35664286.

It is an arithmetic number, because the mean of its divisors is an integer number (35664286).

Almost surely, 2^71328571 is an apocalyptic number.

71328571 is a deficient number, since it is larger than the sum of its proper divisors (1).

71328571 is an equidigital number, since it uses as much as digits as its factorization.

71328571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 34.

The square root of 71328571 is about 8445.6243700510. The cubic root of 71328571 is about 414.7195492322.

The spelling of 71328571 in words is "seventy-one million, three hundred twenty-eight thousand, five hundred seventy-one".