243987552 has 84 divisors (see below), whose sum is σ = 720265140. Its totient is φ = 81321408.

The previous prime is 243987521. The next prime is 243987559. The reversal of 243987552 is 255789342.

243987552 is a `hidden beast` number, since 2 + 4 + 3 + 98 + 7 + 552 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 243987498 and 243987507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243987559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 18099 + ... + 28557.

It is an arithmetic number, because the mean of its divisors is an integer number (8574585).

Almost surely, 2^243987552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243987552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360132570).

243987552 is an abundant number, since it is smaller than the sum of its proper divisors (476277588).

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

243987552 is an equidigital number, since it uses as much as digits as its factorization.

243987552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10487 (or 10464 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 243987552 is about 15620.1008959609. The cubic root of 243987552 is about 624.8693503977.

The spelling of 243987552 in words is "two hundred forty-three million, nine hundred eighty-seven thousand, five hundred fifty-two".