71179945231 has 4 divisors (see below), whose sum is σ = 71845178472. Its totient is φ = 70514711992.

The previous prime is 71179945229. The next prime is 71179945237. The reversal of 71179945231 is 13254997117.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71179945231 - 2¹ = 71179945229 is a prime.

It is a super-2 number, since 2×71179945231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71179945237) 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, 332616460 + ... + 332616673.

It is an arithmetic number, because the mean of its divisors is an integer number (17961294618).

Almost surely, 2^71179945231 is an apocalyptic number.

71179945231 is a deficient number, since it is larger than the sum of its proper divisors (665233241).

71179945231 is a wasteful number, since it uses less digits than its factorization.

71179945231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665233240.

The product of its digits is 476280, while the sum is 49.

The spelling of 71179945231 in words is "seventy-one billion, one hundred seventy-nine million, nine hundred forty-five thousand, two hundred thirty-one".