313505 has 4 divisors (see below), whose sum is σ = 376212. Its totient is φ = 250800.

The previous prime is 313477. The next prime is 313507. The reversal of 313505 is 505313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130321 + 183184 = 361^2 + 428^2 .

It is not a de Polignac number, because 313505 - 2⁸ = 313249 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 313505.

It is not an unprimeable number, because it can be changed into a prime (313507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31346 + ... + 31355.

It is an arithmetic number, because the mean of its divisors is an integer number (94053).

2³¹³⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

313505 is a deficient number, since it is larger than the sum of its proper divisors (62707).

313505 is an equidigital number, since it uses as much as digits as its factorization.

313505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62706.

The product of its (nonzero) digits is 225, while the sum is 17.

The square root of 313505 is about 559.9151721466. The cubic root of 313505 is about 67.9331089619.

Adding to 313505 its reverse (505313), we get a palindrome (818818).

It can be divided in two parts, 313 and 505, that added together give a palindrome (818).

The spelling of 313505 in words is "three hundred thirteen thousand, five hundred five".