318005 has 4 divisors (see below), whose sum is σ = 381612. Its totient is φ = 254400.

The previous prime is 318001. The next prime is 318007. The reversal of 318005 is 500813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500813 = 131 ⋅3823.

It can be written as a sum of positive squares in 2 ways, for example, as 209764 + 108241 = 458^2 + 329^2 .

It is not a de Polignac number, because 318005 - 2² = 318001 is a prime.

It is a super-2 number, since 2×318005² = 202254360050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 318005.

It is not an unprimeable number, because it can be changed into a prime (318001) 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, 31796 + ... + 31805.

It is an arithmetic number, because the mean of its divisors is an integer number (95403).

2³¹⁸⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

318005 is a deficient number, since it is larger than the sum of its proper divisors (63607).

318005 is an equidigital number, since it uses as much as digits as its factorization.

318005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63606.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 318005 is about 563.9193204706. The cubic root of 318005 is about 68.2565997008.

Adding to 318005 its reverse (500813), we get a palindrome (818818).

The spelling of 318005 in words is "three hundred eighteen thousand, five".