71531992322 has 18 divisors (see below), whose sum is σ = 124820647497. Its totient is φ = 30655433424.

The previous prime is 71531992249. The next prime is 71531992331. The reversal of 71531992322 is 22329913517.

It can be written as a sum of positive squares in 2 ways, for example, as 45233207761 + 26298784561 = 212681^2 + 162169^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=189119.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2634158 + ... + 2661174.

Almost surely, 2^71531992322 is an apocalyptic number.

71531992322 is a deficient number, since it is larger than the sum of its proper divisors (53288655175).

71531992322 is an frugal number, since it uses more digits than its factorization.

71531992322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54050 (or 27026 counting only the distinct ones).

The product of its digits is 204120, while the sum is 44.

The spelling of 71531992322 in words is "seventy-one billion, five hundred thirty-one million, nine hundred ninety-two thousand, three hundred twenty-two".