316505 has 8 divisors (see below), whose sum is σ = 434112. Its totient is φ = 217008.

The previous prime is 316501. The next prime is 316507. The reversal of 316505 is 505613.

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 316505 - 2² = 316501 is a prime.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 316505.

It is not an unprimeable number, because it can be changed into a prime (316501) 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, 4487 + ... + 4556.

It is an arithmetic number, because the mean of its divisors is an integer number (54264).

2³¹⁶⁵⁰⁵ is an apocalyptic number.

316505 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

316505 is a deficient number, since it is larger than the sum of its proper divisors (117607).

316505 is an equidigital number, since it uses as much as digits as its factorization.

316505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9055.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 316505 is about 562.5877709300. The cubic root of 316505 is about 68.1491105075.

The spelling of 316505 in words is "three hundred sixteen thousand, five hundred five".