311823 has 8 divisors (see below), whose sum is σ = 462000. Its totient is φ = 207864.

The previous prime is 311821. The next prime is 311827. The reversal of 311823 is 328113.

311823 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 311823 - 2¹ = 311821 is a prime.

311823 is strictly pandigital in base 7.

311823 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 311796 and 311805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311821) 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, 5748 + ... + 5801.

It is an arithmetic number, because the mean of its divisors is an integer number (57750).

2³¹¹⁸²³ is an apocalyptic number.

311823 is a deficient number, since it is larger than the sum of its proper divisors (150177).

311823 is a wasteful number, since it uses less digits than its factorization.

311823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11558 (or 11552 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 311823 is about 558.4111388574. The cubic root of 311823 is about 67.8114006986.

Adding to 311823 its reverse (328113), we get a palindrome (639936).

Subtracting 311823 from its reverse (328113), we obtain a triangular number (16290 = T₁₈₀).

The spelling of 311823 in words is "three hundred eleven thousand, eight hundred twenty-three".