71013571 has 4 divisors (see below), whose sum is σ = 71524600. Its totient is φ = 70502544.

The previous prime is 71013541. The next prime is 71013611. The reversal of 71013571 is 17531017.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17531017 = 7 ⋅2504431.

It is a cyclic number.

It is not a de Polignac number, because 71013571 - 2¹⁷ = 70882499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71013541) 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 in 3 ways as a sum of consecutive naturals, for example, 255306 + ... + 255583.

It is an arithmetic number, because the mean of its divisors is an integer number (17881150).

Almost surely, 2^71013571 is an apocalyptic number.

71013571 is a deficient number, since it is larger than the sum of its proper divisors (511029).

71013571 is a wasteful number, since it uses less digits than its factorization.

71013571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511028.

The product of its (nonzero) digits is 735, while the sum is 25.

The square root of 71013571 is about 8426.9550253932. The cubic root of 71013571 is about 414.1081559083.

Adding to 71013571 its reverse (17531017), we get a palindrome (88544588).

The spelling of 71013571 in words is "seventy-one million, thirteen thousand, five hundred seventy-one".