315311 has 4 divisors (see below), whose sum is σ = 319824. Its totient is φ = 310800.

The previous prime is 315281. The next prime is 315313. The reversal of 315311 is 113513.

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 315311 - 2⁶ = 315247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2150 + ... + 2291.

It is an arithmetic number, because the mean of its divisors is an integer number (79956).

2³¹⁵³¹¹ is an apocalyptic number.

315311 is a deficient number, since it is larger than the sum of its proper divisors (4513).

315311 is an equidigital number, since it uses as much as digits as its factorization.

315311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4512.

The product of its digits is 45, while the sum is 14.

The square root of 315311 is about 561.5256004850. The cubic root of 315311 is about 68.0633060974.

Adding to 315311 its reverse (113513), we get a palindrome (428824).

It can be divided in two parts, 315 and 311, that added together give a palindrome (626).

The spelling of 315311 in words is "three hundred fifteen thousand, three hundred eleven".