231310224 has 30 divisors (see below), whose sum is σ = 647347766. Its totient is φ = 77103360.

The previous prime is 231310213. The next prime is 231310229. The reversal of 231310224 is 422013132.

It can be written as a sum of positive squares in only one way, i.e., 185504400 + 45805824 = 13620^2 + 6768^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231310197 and 231310206.

It is not an unprimeable number, because it can be changed into a prime (231310229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 803017 + ... + 803304.

Almost surely, 2^231310224 is an apocalyptic number.

231310224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

231310224 is an abundant number, since it is smaller than the sum of its proper divisors (416037542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231310224 is a wasteful number, since it uses less digits than its factorization.

231310224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606335 (or 1606326 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 231310224 is about 15208.8863497628. The cubic root of 231310224 is about 613.8537921067.

Adding to 231310224 its reverse (422013132), we get a palindrome (653323356).

The spelling of 231310224 in words is "two hundred thirty-one million, three hundred ten thousand, two hundred twenty-four".