243243400441 has 4 divisors (see below), whose sum is σ = 247366170000. Its totient is φ = 239120630884.

The previous prime is 243243400417. The next prime is 243243400447. The reversal of 243243400441 is 144004342342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243243400441 - 2¹⁵ = 243243367673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243243400447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2061384691 + ... + 2061384808.

It is an arithmetic number, because the mean of its divisors is an integer number (61841542500).

Almost surely, 2^243243400441 is an apocalyptic number.

It is an amenable number.

243243400441 is a deficient number, since it is larger than the sum of its proper divisors (4122769559).

243243400441 is an equidigital number, since it uses as much as digits as its factorization.

243243400441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4122769558.

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 243243400441 its reverse (144004342342), we get a palindrome (387247742783).

The spelling of 243243400441 in words is "two hundred forty-three billion, two hundred forty-three million, four hundred thousand, four hundred forty-one".