231824 has 10 divisors (see below), whose sum is σ = 449190. Its totient is φ = 115904.

The previous prime is 231823. The next prime is 231827. The reversal of 231824 is 428132.

It can be written as a sum of positive squares in only one way, i.e., 160000 + 71824 = 400^2 + 268^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231796 and 231805.

It is not an unprimeable number, because it can be changed into a prime (231821) 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 as a sum of consecutive naturals, namely, 7229 + ... + 7260.

It is an arithmetic number, because the mean of its divisors is an integer number (44919).

2²³¹⁸²⁴ is an apocalyptic number.

It is an amenable number.

231824 is a deficient number, since it is larger than the sum of its proper divisors (217366).

231824 is a wasteful number, since it uses less digits than its factorization.

231824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14497 (or 14491 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 231824 is about 481.4810484329. The cubic root of 231824 is about 61.4307944288.

Adding to 231824 its reverse (428132), we get a palindrome (659956).

The spelling of 231824 in words is "two hundred thirty-one thousand, eight hundred twenty-four".