315823 has 4 divisors (see below), whose sum is σ = 323568. Its totient is φ = 308080.

The previous prime is 315811. The next prime is 315829. The reversal of 315823 is 328513.

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

It is a cyclic number.

It is not a de Polignac number, because 315823 - 2¹³ = 307631 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 315794 and 315803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3811 + ... + 3892.

It is an arithmetic number, because the mean of its divisors is an integer number (80892).

2³¹⁵⁸²³ is an apocalyptic number.

315823 is a deficient number, since it is larger than the sum of its proper divisors (7745).

315823 is an equidigital number, since it uses as much as digits as its factorization.

315823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7744.

The product of its digits is 720, while the sum is 22.

The square root of 315823 is about 561.9813164154. The cubic root of 315823 is about 68.1001264298.

The spelling of 315823 in words is "three hundred fifteen thousand, eight hundred twenty-three".