231130224 has 120 divisors (see below), whose sum is σ = 700600992. Its totient is φ = 70709760.

The previous prime is 231130217. The next prime is 231130253. The reversal of 231130224 is 422031132.

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 = 231130197 and 231130206.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 581994 + ... + 582390.

Almost surely, 2^231130224 is an apocalyptic number.

231130224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231130224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350300496).

231130224 is an abundant number, since it is smaller than the sum of its proper divisors (469470768).

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

231130224 is a wasteful number, since it uses less digits than its factorization.

231130224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735 (or 726 counting only the distinct ones).

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

The square root of 231130224 is about 15202.9676050434. The cubic root of 231130224 is about 613.6945220807.

Adding to 231130224 its reverse (422031132), we get a palindrome (653161356).

The spelling of 231130224 in words is "two hundred thirty-one million, one hundred thirty thousand, two hundred twenty-four".