243721632 has 96 divisors (see below), whose sum is σ = 797658624. Its totient is φ = 63302400.

The previous prime is 243721609. The next prime is 243721663. The reversal of 243721632 is 236127342.

243721632 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 243721632.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9094 + ... + 23877.

It is an arithmetic number, because the mean of its divisors is an integer number (8308944).

Almost surely, 2^243721632 is an apocalyptic number.

243721632 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

243721632 is an abundant number, since it is smaller than the sum of its proper divisors (553936992).

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

243721632 is a wasteful number, since it uses less digits than its factorization.

243721632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33002 (or 32994 counting only the distinct ones).

The product of its digits is 12096, while the sum is 30.

The square root of 243721632 is about 15611.5864664678. The cubic root of 243721632 is about 624.6422545749.

Adding to 243721632 its reverse (236127342), we get a palindrome (479848974).

The spelling of 243721632 in words is "two hundred forty-three million, seven hundred twenty-one thousand, six hundred thirty-two".