71531516131 has 8 divisors (see below), whose sum is σ = 75746129184. Its totient is φ = 67317667200.

The previous prime is 71531516051. The next prime is 71531516143. The reversal of 71531516131 is 13161513517.

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 71531516131 - 2⁹ = 71531515619 is a prime.

It is a super-2 number, since 2×71531516131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71531516531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7621 + ... + 378313.

It is an arithmetic number, because the mean of its divisors is an integer number (9468266148).

Almost surely, 2^71531516131 is an apocalyptic number.

71531516131 is a deficient number, since it is larger than the sum of its proper divisors (4214613053).

71531516131 is a wasteful number, since it uses less digits than its factorization.

71531516131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382061.

The product of its digits is 9450, while the sum is 34.

The spelling of 71531516131 in words is "seventy-one billion, five hundred thirty-one million, five hundred sixteen thousand, one hundred thirty-one".