232643220 has 192 divisors, whose sum is σ = 735436800. Its totient is φ = 54673920.

The previous prime is 232643219. The next prime is 232643227. The reversal of 232643220 is 22346232.

It is a happy number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232643227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1024747 + ... + 1024973.

It is an arithmetic number, because the mean of its divisors is an integer number (3830400).

Almost surely, 2^232643220 is an apocalyptic number.

232643220 is a gapful number since it is divisible by the number (20) 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 232643220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367718400).

232643220 is an abundant number, since it is smaller than the sum of its proper divisors (502793580).

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

232643220 is a wasteful number, since it uses less digits than its factorization.

232643220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 232643220 is about 15252.6463277688. The cubic root of 232643220 is about 615.0307077006.

Adding to 232643220 its reverse (22346232), we get a palindrome (254989452).

The spelling of 232643220 in words is "two hundred thirty-two million, six hundred forty-three thousand, two hundred twenty".