71313931 has 8 divisors (see below), whose sum is σ = 76865264. Its totient is φ = 65772000.

The previous prime is 71313923. The next prime is 71313971. The reversal of 71313931 is 13931317.

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 71313931 - 2³ = 71313923 is a prime.

It is a super-2 number, since 2×71313931² = 10171353509345522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71313931.

It is not an unprimeable number, because it can be changed into a prime (71313971) 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, 28045 + ... + 30481.

It is an arithmetic number, because the mean of its divisors is an integer number (9608158).

Almost surely, 2^71313931 is an apocalyptic number.

71313931 is a deficient number, since it is larger than the sum of its proper divisors (5551333).

71313931 is a wasteful number, since it uses less digits than its factorization.

71313931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4701.

The product of its digits is 1701, while the sum is 28.

The square root of 71313931 is about 8444.7576045734. The cubic root of 71313931 is about 414.6911739283.

The spelling of 71313931 in words is "seventy-one million, three hundred thirteen thousand, nine hundred thirty-one".