243223812720 has 1440 divisors, whose sum is σ = 1037086622208. Its totient is φ = 52766816256.

The previous prime is 243223812707. The next prime is 243223812721. The reversal of 243223812720 is 27218322342.

243223812720 is a `hidden beast` number, since 2 + 4 + 3 + 2 + 2 + 381 + 272 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243223812721) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 2361396189 + ... + 2361396291.

Almost surely, 2^243223812720 is an apocalyptic number.

243223812720 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 243223812720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (518543311104).

243223812720 is an abundant number, since it is smaller than the sum of its proper divisors (793862809488).

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

243223812720 is a wasteful number, since it uses less digits than its factorization.

243223812720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The spelling of 243223812720 in words is "two hundred forty-three billion, two hundred twenty-three million, eight hundred twelve thousand, seven hundred twenty".