243403431444 has 18 divisors (see below), whose sum is σ = 615269785130. Its totient is φ = 81134477136.

The previous prime is 243403431443. The next prime is 243403431449. The reversal of 243403431444 is 444134304342.

243403431444 is a `hidden beast` number, since 243 + 403 + 4 + 3 + 1 + 4 + 4 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 237352147344 + 6051284100 = 487188^2 + 77790^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 6761206429 = 243403431444 / (2 + 4 + 3 + 4 + 0 + 3 + 4 + 3 + 1 + 4 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 243403431399 and 243403431408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243403431443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3380603179 + ... + 3380603250.

Almost surely, 2^243403431444 is an apocalyptic number.

It is an amenable number.

243403431444 is an abundant number, since it is smaller than the sum of its proper divisors (371866353686).

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

243403431444 is a wasteful number, since it uses less digits than its factorization.

243403431444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6761206439 (or 6761206434 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 36.

Adding to 243403431444 its reverse (444134304342), we get a palindrome (687537735786).

The spelling of 243403431444 in words is "two hundred forty-three billion, four hundred three million, four hundred thirty-one thousand, four hundred forty-four".