243321456 has 80 divisors (see below), whose sum is σ = 733088000. Its totient is φ = 69515712.

The previous prime is 243321451. The next prime is 243321499. The reversal of 243321456 is 654123342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243321451) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9075 + ... + 23853.

It is an arithmetic number, because the mean of its divisors is an integer number (9163600).

Almost surely, 2^243321456 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 243321456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366544000).

243321456 is an abundant number, since it is smaller than the sum of its proper divisors (489766544).

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

243321456 is a wasteful number, since it uses less digits than its factorization.

243321456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14811 (or 14791 counting only the distinct ones).

The product of its digits is 17280, while the sum is 30.

The square root of 243321456 is about 15598.7645664649. The cubic root of 243321456 is about 624.3001925103.

Adding to 243321456 its reverse (654123342), we get a palindrome (897444798).

The spelling of 243321456 in words is "two hundred forty-three million, three hundred twenty-one thousand, four hundred fifty-six".