243412220 has 24 divisors (see below), whose sum is σ = 533391264. Its totient is φ = 93131456.

The previous prime is 243412219. The next prime is 243412259. The reversal of 243412220 is 22214342.

243412220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 243412192 and 243412201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264119 + ... + 265038.

It is an arithmetic number, because the mean of its divisors is an integer number (22224636).

Almost surely, 2^243412220 is an apocalyptic number.

243412220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243412220 is an abundant number, since it is smaller than the sum of its proper divisors (289979044).

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

243412220 is a wasteful number, since it uses less digits than its factorization.

243412220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529189 (or 529187 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 243412220 is about 15601.6736281721. The cubic root of 243412220 is about 624.3778085433.

Adding to 243412220 its reverse (22214342), we get a palindrome (265626562).

The spelling of 243412220 in words is "two hundred forty-three million, four hundred twelve thousand, two hundred twenty".