71310083321 has 4 divisors (see below), whose sum is σ = 71679565812. Its totient is φ = 70940600832.

The previous prime is 71310083297. The next prime is 71310083347. The reversal of 71310083321 is 12338001317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12338001317 = 277 ⋅44541521.

It can be written as a sum of positive squares in 2 ways, for example, as 29453424400 + 41856658921 = 171620^2 + 204589^2 .

It is a cyclic number.

It is not a de Polignac number, because 71310083321 - 2³⁴ = 54130214137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71310083381) 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 3 ways as a sum of consecutive naturals, for example, 184740956 + ... + 184741341.

It is an arithmetic number, because the mean of its divisors is an integer number (17919891453).

Almost surely, 2^71310083321 is an apocalyptic number.

It is an amenable number.

71310083321 is a deficient number, since it is larger than the sum of its proper divisors (369482491).

71310083321 is a wasteful number, since it uses less digits than its factorization.

71310083321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369482490.

The product of its (nonzero) digits is 3024, while the sum is 29.

Adding to 71310083321 its reverse (12338001317), we get a palindrome (83648084638).

The spelling of 71310083321 in words is "seventy-one billion, three hundred ten million, eighty-three thousand, three hundred twenty-one".