71031531473 has 8 divisors (see below), whose sum is σ = 81194910720. Its totient is φ = 60872156640.

The previous prime is 71031531469. The next prime is 71031531533. The reversal of 71031531473 is 37413513017.

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 71031531473 - 2² = 71031531469 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71031531433) 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, 962993 + ... + 1034126.

It is an arithmetic number, because the mean of its divisors is an integer number (10149363840).

Almost surely, 2^71031531473 is an apocalyptic number.

It is an amenable number.

71031531473 is a deficient number, since it is larger than the sum of its proper divisors (10163379247).

71031531473 is a wasteful number, since it uses less digits than its factorization.

71031531473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2002207.

The product of its (nonzero) digits is 26460, while the sum is 35.

The spelling of 71031531473 in words is "seventy-one billion, thirty-one million, five hundred thirty-one thousand, four hundred seventy-three".