243601056 has 72 divisors (see below), whose sum is σ = 694299060. Its totient is φ = 81017856.

The previous prime is 243601031. The next prime is 243601097. The reversal of 243601056 is 650106342.

243601056 is a `hidden beast` number, since 2 + 4 + 3 + 601 + 0 + 56 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 234090000 + 9511056 = 15300^2 + 3084^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203596 + ... + 204788.

Almost surely, 2^243601056 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 243601056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347149530).

243601056 is an abundant number, since it is smaller than the sum of its proper divisors (450698004).

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

243601056 is a wasteful number, since it uses less digits than its factorization.

243601056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918 (or 1907 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 243601056 is about 15607.7242415414. The cubic root of 243601056 is about 624.5392281731.

Adding to 243601056 its reverse (650106342), we get a palindrome (893707398).

The spelling of 243601056 in words is "two hundred forty-three million, six hundred one thousand, fifty-six".