243561472 has 88 divisors (see below), whose sum is σ = 607222080. Its totient is φ = 94863360.

The previous prime is 243561463. The next prime is 243561497. The reversal of 243561472 is 274165342.

It is a tau number, because it is divible by the number of its divisors (88).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77304 + ... + 80392.

Almost surely, 2^243561472 is an apocalyptic number.

243561472 is a gapful number since it is divisible by the number (22) 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 243561472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303611040).

243561472 is an abundant number, since it is smaller than the sum of its proper divisors (363660608).

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

243561472 is a wasteful number, since it uses less digits than its factorization.

243561472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3127 (or 3109 counting only the distinct ones).

The product of its digits is 40320, while the sum is 34.

The square root of 243561472 is about 15606.4560999607. The cubic root of 243561472 is about 624.5053981336.

The spelling of 243561472 in words is "two hundred forty-three million, five hundred sixty-one thousand, four hundred seventy-two".