243003220 has 24 divisors (see below), whose sum is σ = 511477344. Its totient is φ = 96978336.

The previous prime is 243003181. The next prime is 243003221. The reversal of 243003220 is 22300342.

It is a junction number, because it is equal to n+sod(n) for n = 243003194 and 243003203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243003221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4854 + ... + 22573.

It is an arithmetic number, because the mean of its divisors is an integer number (21311556).

Almost surely, 2^243003220 is an apocalyptic number.

243003220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243003220 is an abundant number, since it is smaller than the sum of its proper divisors (268474124).

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

243003220 is a wasteful number, since it uses less digits than its factorization.

243003220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27879 (or 27877 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 243003220 is about 15588.5605493259. The cubic root of 243003220 is about 624.0279032285.

Adding to 243003220 its reverse (22300342), we get a palindrome (265303562).

The spelling of 243003220 in words is "two hundred forty-three million, three thousand, two hundred twenty".