71312361 has 8 divisors (see below), whose sum is σ = 97294560. Its totient is φ = 46435872.

The previous prime is 71312341. The next prime is 71312387. The reversal of 71312361 is 16321317.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71312361 - 2¹⁹ = 70788073 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71312341) 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, 276276 + ... + 276533.

It is an arithmetic number, because the mean of its divisors is an integer number (12161820).

Almost surely, 2^71312361 is an apocalyptic number.

It is an amenable number.

71312361 is a deficient number, since it is larger than the sum of its proper divisors (25982199).

71312361 is a wasteful number, since it uses less digits than its factorization.

71312361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552855.

The product of its digits is 756, while the sum is 24.

The square root of 71312361 is about 8444.6646469827. The cubic root of 71312361 is about 414.6881307177.

Adding to 71312361 its reverse (16321317), we get a palindrome (87633678).

The spelling of 71312361 in words is "seventy-one million, three hundred twelve thousand, three hundred sixty-one".