243021043320 has 256 divisors, whose sum is σ = 816806592000. Its totient is φ = 57331507200.

The previous prime is 243021043319. The next prime is 243021043367. The reversal of 243021043320 is 23340120342.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22129591 + ... + 22140569.

It is an arithmetic number, because the mean of its divisors is an integer number (3190650750).

Almost surely, 2^243021043320 is an apocalyptic number.

243021043320 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 243021043320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (408403296000).

243021043320 is an abundant number, since it is smaller than the sum of its proper divisors (573785548680).

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

243021043320 is a wasteful number, since it uses less digits than its factorization.

243021043320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11454 (or 11450 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 243021043320 its reverse (23340120342), we get a palindrome (266361163662).

The spelling of 243021043320 in words is "two hundred forty-three billion, twenty-one million, forty-three thousand, three hundred twenty".