243421230 has 64 divisors (see below), whose sum is σ = 636310080. Its totient is φ = 59237376.

The previous prime is 243421193. The next prime is 243421247. The reversal of 243421230 is 32124342.

It is a junction number, because it is equal to n+sod(n) for n = 243421197 and 243421206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31204 + ... + 38216.

It is an arithmetic number, because the mean of its divisors is an integer number (9942345).

Almost surely, 2^243421230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243421230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318155040).

243421230 is an abundant number, since it is smaller than the sum of its proper divisors (392888850).

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

243421230 is a wasteful number, since it uses less digits than its factorization.

243421230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7125.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 243421230 is about 15601.9623765730. The cubic root of 243421230 is about 624.3855123125.

Adding to 243421230 its reverse (32124342), we get a palindrome (275545572).

The spelling of 243421230 in words is "two hundred forty-three million, four hundred twenty-one thousand, two hundred thirty".