71531372571 has 8 divisors (see below), whose sum is σ = 99521909760. Its totient is φ = 45614208552.

The previous prime is 71531372551. The next prime is 71531372579. The reversal of 71531372571 is 17527313517.

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

It is not a de Polignac number, because 71531372571 - 2¹⁴ = 71531356187 is a prime.

It is a super-2 number, since 2×71531372571² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71531372579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518343211 + ... + 518343348.

It is an arithmetic number, because the mean of its divisors is an integer number (12440238720).

Almost surely, 2^71531372571 is an apocalyptic number.

71531372571 is a deficient number, since it is larger than the sum of its proper divisors (27990537189).

71531372571 is a wasteful number, since it uses less digits than its factorization.

71531372571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036686585.

The product of its digits is 154350, while the sum is 42.

The spelling of 71531372571 in words is "seventy-one billion, five hundred thirty-one million, three hundred seventy-two thousand, five hundred seventy-one".