243644443 has 16 divisors (see below), whose sum is σ = 281223936. Its totient is φ = 206771040.

The previous prime is 243644441. The next prime is 243644449. The reversal of 243644443 is 344446342.

243644443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243644443 - 2¹ = 243644441 is a prime.

It is a super-2 number, since 2×243644443² = 118725229209560498, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243644399 and 243644408.

It is not an unprimeable number, because it can be changed into a prime (243644441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 432480 + ... + 433042.

It is an arithmetic number, because the mean of its divisors is an integer number (17576496).

Almost surely, 2^243644443 is an apocalyptic number.

243644443 is a deficient number, since it is larger than the sum of its proper divisors (37579493).

243644443 is a wasteful number, since it uses less digits than its factorization.

243644443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074.

The product of its digits is 110592, while the sum is 34.

The square root of 243644443 is about 15609.1141004222. The cubic root of 243644443 is about 624.5763041959.

The spelling of 243644443 in words is "two hundred forty-three million, six hundred forty-four thousand, four hundred forty-three".