51718 has 8 divisors (see below), whose sum is σ = 81720. Its totient is φ = 24480.

The previous prime is 51713. The next prime is 51719. The reversal of 51718 is 81715.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643 + ... + 718.

It is an arithmetic number, because the mean of its divisors is an integer number (10215).

2⁵¹⁷¹⁸ is an apocalyptic number.

51718 is a deficient number, since it is larger than the sum of its proper divisors (30002).

51718 is a wasteful number, since it uses less digits than its factorization.

51718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382.

The product of its digits is 280, while the sum is 22.

The square root of 51718 is about 227.4159185281. The cubic root of 51718 is about 37.2575169131.

It can be divided in two parts, 517 and 18, that added together give a palindrome (535).

The spelling of 51718 in words is "fifty-one thousand, seven hundred eighteen".