243720215200 has 288 divisors, whose sum is σ = 744919072128. Its totient is φ = 75644928000.

The previous prime is 243720215153. The next prime is 243720215261. The reversal of 243720215200 is 2512027342.

It is a super-2 number, since 2×243720215200² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14837392 + ... + 14853808.

It is an arithmetic number, because the mean of its divisors is an integer number (2586524556).

Almost surely, 2^243720215200 is an apocalyptic number.

243720215200 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 243720215200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (372459536064).

243720215200 is an abundant number, since it is smaller than the sum of its proper divisors (501198856928).

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

243720215200 is a wasteful number, since it uses less digits than its factorization.

243720215200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16696 (or 16683 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The spelling of 243720215200 in words is "two hundred forty-three billion, seven hundred twenty million, two hundred fifteen thousand, two hundred".