71013131 has 8 divisors (see below), whose sum is σ = 85932000. Its totient is φ = 57287808.

The previous prime is 71013119. The next prime is 71013133. The reversal of 71013131 is 13131017.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71013131 - 2⁶ = 71013067 is a prime.

It is a super-2 number, since 2×71013131² = 10085729548846322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (71013133) 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 7 ways as a sum of consecutive naturals, for example, 298256 + ... + 298493.

It is an arithmetic number, because the mean of its divisors is an integer number (10741500).

Almost surely, 2^71013131 is an apocalyptic number.

71013131 is a deficient number, since it is larger than the sum of its proper divisors (14918869).

71013131 is a wasteful number, since it uses less digits than its factorization.

71013131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596773.

The product of its (nonzero) digits is 63, while the sum is 17.

The square root of 71013131 is about 8426.9289186512. The cubic root of 71013131 is about 414.1073006353.

Adding to 71013131 its reverse (13131017), we get a palindrome (84144148).

The spelling of 71013131 in words is "seventy-one million, thirteen thousand, one hundred thirty-one".