243303020 has 96 divisors (see below), whose sum is σ = 548674560. Its totient is φ = 90498560.

The previous prime is 243302981. The next prime is 243303023. The reversal of 243303020 is 20303342.

It is a super-2 number, since 2×243303020² = 118392719082240800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243303020.

It is not an unprimeable number, because it can be changed into a prime (243303023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2273807 + ... + 2273913.

It is an arithmetic number, because the mean of its divisors is an integer number (5715360).

Almost surely, 2^243303020 is an apocalyptic number.

243303020 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 243303020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274337280).

243303020 is an abundant number, since it is smaller than the sum of its proper divisors (305371540).

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

243303020 is a wasteful number, since it uses less digits than its factorization.

243303020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 17.

The square root of 243303020 is about 15598.1736110354. The cubic root of 243303020 is about 624.2844247693.

Adding to 243303020 its reverse (20303342), we get a palindrome (263606362).

The spelling of 243303020 in words is "two hundred forty-three million, three hundred three thousand, twenty".