243232232220 has 72 divisors (see below), whose sum is σ = 754962704496. Its totient is φ = 63353509632.

The previous prime is 243232232203. The next prime is 243232232291. The reversal of 243232232220 is 22232232342.

243232232220 is a `hidden beast` number, since 2 + 432 + 3 + 2 + 2 + 3 + 2 + 220 = 666.

It is a super-2 number, since 2×243232232220² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15704937 + ... + 15720416.

It is an arithmetic number, because the mean of its divisors is an integer number (10485593118).

Almost surely, 2^243232232220 is an apocalyptic number.

243232232220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243232232220 is an abundant number, since it is smaller than the sum of its proper divisors (511730472276).

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

243232232220 is a wasteful number, since it uses less digits than its factorization.

243232232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31425411 (or 31425406 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 243232232220 its reverse (22232232342), we get a palindrome (265464464562).

The spelling of 243232232220 in words is "two hundred forty-three billion, two hundred thirty-two million, two hundred thirty-two thousand, two hundred twenty".