243303220 has 12 divisors (see below), whose sum is σ = 510936804. Its totient is φ = 97321280.

The previous prime is 243303211. The next prime is 243303239. The reversal of 243303220 is 22303342.

It can be written as a sum of positive squares in 2 ways, for example, as 124144164 + 119159056 = 11142^2 + 10916^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6082561 + ... + 6082600.

It is an arithmetic number, because the mean of its divisors is an integer number (42578067).

Almost surely, 2^243303220 is an apocalyptic number.

243303220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243303220 is an abundant number, since it is smaller than the sum of its proper divisors (267633584).

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

243303220 is a wasteful number, since it uses less digits than its factorization.

243303220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12165170 (or 12165168 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 243303220 is about 15598.1800220410. The cubic root of 243303220 is about 624.2845958274.

Adding to 243303220 its reverse (22303342), we get a palindrome (265606562).

The spelling of 243303220 in words is "two hundred forty-three million, three hundred three thousand, two hundred twenty".