243244273 has 4 divisors (see below), whose sum is σ = 243275508. Its totient is φ = 243213040.

The previous prime is 243244247. The next prime is 243244307. The reversal of 243244273 is 372442342.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 26801329 + 216442944 = 5177^2 + 14712^2 .

It is a cyclic number.

It is not a de Polignac number, because 243244273 - 2⁹ = 243243761 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243214273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6603 + ... + 23023.

It is an arithmetic number, because the mean of its divisors is an integer number (60818877).

Almost surely, 2^243244273 is an apocalyptic number.

It is an amenable number.

243244273 is a deficient number, since it is larger than the sum of its proper divisors (31235).

243244273 is a wasteful number, since it uses less digits than its factorization.

243244273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31234.

The product of its digits is 32256, while the sum is 31.

The square root of 243244273 is about 15596.2903602107. The cubic root of 243244273 is about 624.2341749625.

The spelling of 243244273 in words is "two hundred forty-three million, two hundred forty-four thousand, two hundred seventy-three".