243326641 has 4 divisors (see below), whose sum is σ = 243429732. Its totient is φ = 243223552.

The previous prime is 243326599. The next prime is 243326651. The reversal of 243326641 is 146623342.

243326641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 228886641 + 14440000 = 15129^2 + 3800^2 .

It is a cyclic number.

It is not a de Polignac number, because 243326641 - 2¹⁷ = 243195569 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 (243326651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47920 + ... + 52753.

It is an arithmetic number, because the mean of its divisors is an integer number (60857433).

Almost surely, 2^243326641 is an apocalyptic number.

It is an amenable number.

243326641 is a deficient number, since it is larger than the sum of its proper divisors (103091).

243326641 is a wasteful number, since it uses less digits than its factorization.

243326641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103090.

The product of its digits is 20736, while the sum is 31.

The square root of 243326641 is about 15598.9307646390. The cubic root of 243326641 is about 624.3046269370.

Adding to 243326641 its reverse (146623342), we get a palindrome (389949983).

The spelling of 243326641 in words is "two hundred forty-three million, three hundred twenty-six thousand, six hundred forty-one".