243043000001 has 2 divisors, whose sum is σ = 243043000002. Its totient is φ = 243043000000.

The previous prime is 243042999977. The next prime is 243043000027. The reversal of 243043000001 is 100000340342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218103010225 + 24939989776 = 467015^2 + 157924^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243043000001 is a prime.

It is not a weakly prime, because it can be changed into another prime (243043000901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121521500000 + 121521500001.

It is an arithmetic number, because the mean of its divisors is an integer number (121521500001).

Almost surely, 2^243043000001 is an apocalyptic number.

It is an amenable number.

243043000001 is a deficient number, since it is larger than the sum of its proper divisors (1).

243043000001 is an equidigital number, since it uses as much as digits as its factorization.

243043000001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 243043000001 its reverse (100000340342), we get a palindrome (343043340343).

The spelling of 243043000001 in words is "two hundred forty-three billion, forty-three million, one", and thus it is an aban number.