318 has 8 divisors (see below), whose sum is σ = 648. Its totient is φ = 104.

The previous prime is 317. The next prime is 331. The reversal of 318 is 813.

It can be divided in two parts, 3 and 18, that added together give a triangular number (21 = T_{6}).

318 is nontrivially palindromic in base 9.

318 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

318 is an admirable number.

It is a super-2 number, since 2×318^{2} = 202248, which contains 22 as substring.

318 is an undulating number in base 9.

It is a plaindrome in base 5, base 11, base 12, base 14 and base 16.

It is a nialpdrome in base 7.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311) 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, 21 + ... + 32.

It is an arithmetic number, because the mean of its divisors is an integer number (81).

318 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324).

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

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

The sum of its prime factors is 58.

The product of its digits is 24, while the sum is 12.

The square root of 318 is about 17.8325545001. The cubic root of 318 is about 6.8256241966.

The spelling of 318 in words is "three hundred eighteen", and thus it is an aban number and an oban number.

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