243340441 has 4 divisors (see below), whose sum is σ = 243464292. Its totient is φ = 243216592.

The previous prime is 243340439. The next prime is 243340469. The reversal of 243340441 is 144043342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 114404416 + 128936025 = 10696^2 + 11355^2 .

It is a cyclic number.

It is not a de Polignac number, because 243340441 - 2¹ = 243340439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243340541) 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 3 ways as a sum of consecutive naturals, for example, 58930 + ... + 62923.

It is an arithmetic number, because the mean of its divisors is an integer number (60866073).

Almost surely, 2^243340441 is an apocalyptic number.

It is an amenable number.

243340441 is a deficient number, since it is larger than the sum of its proper divisors (123851).

243340441 is a wasteful number, since it uses less digits than its factorization.

243340441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123850.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 243340441 is about 15599.3730963779. The cubic root of 243340441 is about 624.3164289616.

Adding to 243340441 its reverse (144043342), we get a palindrome (387383783).

The spelling of 243340441 in words is "two hundred forty-three million, three hundred forty thousand, four hundred forty-one".