243306220 has 12 divisors (see below), whose sum is σ = 510943104. Its totient is φ = 97322480.

The previous prime is 243306211. The next prime is 243306223. The reversal of 243306220 is 22603342.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 243306191 and 243306200.

It is not an unprimeable number, because it can be changed into a prime (243306223) 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, 6082636 + ... + 6082675.

It is an arithmetic number, because the mean of its divisors is an integer number (42578592).

Almost surely, 2^243306220 is an apocalyptic number.

243306220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243306220 is an abundant number, since it is smaller than the sum of its proper divisors (267636884).

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

243306220 is a wasteful number, since it uses less digits than its factorization.

243306220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12165320 (or 12165318 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 243306220 is about 15598.2761868099. The cubic root of 243306220 is about 624.2871616876.

Adding to 243306220 its reverse (22603342), we get a palindrome (265909562).

The spelling of 243306220 in words is "two hundred forty-three million, three hundred six thousand, two hundred twenty".