231223824 has 60 divisors (see below), whose sum is σ = 696888556. Its totient is φ = 71145216.

The previous prime is 231223801. The next prime is 231223831. The reversal of 231223824 is 428322132.

It can be written as a sum of positive squares in 2 ways, for example, as 9809424 + 221414400 = 3132^2 + 14880^2 .

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59887 + ... + 63630.

Almost surely, 2^231223824 is an apocalyptic number.

231223824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

231223824 is an abundant number, since it is smaller than the sum of its proper divisors (465664732).

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

231223824 is a wasteful number, since it uses less digits than its factorization.

231223824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123544 (or 123535 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 231223824 is about 15206.0456398105. The cubic root of 231223824 is about 613.7773528100. Note that the first 3 decimals are identical.

Adding to 231223824 its reverse (428322132), we get a palindrome (659545956).

The spelling of 231223824 in words is "two hundred thirty-one million, two hundred twenty-three thousand, eight hundred twenty-four".