231444224 has 36 divisors (see below), whose sum is σ = 503989080. Its totient is φ = 105200640.

The previous prime is 231444223. The next prime is 231444229. The reversal of 231444224 is 422444132.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 231444193 and 231444202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231444223) 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, 38279 + ... + 43910.

Almost surely, 2^231444224 is an apocalyptic number.

It is an amenable number.

231444224 is an abundant number, since it is smaller than the sum of its proper divisors (272544856).

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

231444224 is an equidigital number, since it uses as much as digits as its factorization.

231444224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82216 (or 82202 counting only the distinct ones).

The product of its digits is 6144, while the sum is 26.

The square root of 231444224 is about 15213.2910312003. The cubic root of 231444224 is about 613.9723061494.

Adding to 231444224 its reverse (422444132), we get a palindrome (653888356).

The spelling of 231444224 in words is "two hundred thirty-one million, four hundred forty-four thousand, two hundred twenty-four".