243440455 has 8 divisors (see below), whose sum is σ = 292265712. Its totient is φ = 194660928.

The previous prime is 243440453. The next prime is 243440557. The reversal of 243440455 is 554044342.

243440455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243440455 - 2¹ = 243440453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243440453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1644 + ... + 22126.

It is an arithmetic number, because the mean of its divisors is an integer number (36533214).

Almost surely, 2^243440455 is an apocalyptic number.

243440455 is a deficient number, since it is larger than the sum of its proper divisors (48825257).

243440455 is a wasteful number, since it uses less digits than its factorization.

243440455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22865.

The product of its (nonzero) digits is 38400, while the sum is 31.

The square root of 243440455 is about 15602.5784728038. The cubic root of 243440455 is about 624.4019495195.

Adding to 243440455 its reverse (554044342), we get a palindrome (797484797).

The spelling of 243440455 in words is "two hundred forty-three million, four hundred forty thousand, four hundred fifty-five".