243400412201 has 4 divisors (see below), whose sum is σ = 243441305172. Its totient is φ = 243359519232.

The previous prime is 243400412197. The next prime is 243400412207. The reversal of 243400412201 is 102214004342.

243400412201 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, and also an emirpimes, since its reverse is a distinct semiprime: 102214004342 = 2 ⋅51107002171.

It can be written as a sum of positive squares in 2 ways, for example, as 65042851225 + 178357560976 = 255035^2 + 422324^2 .

It is a cyclic number.

It is not a de Polignac number, because 243400412201 - 2² = 243400412197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243400412207) 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, 20437556 + ... + 20449461.

It is an arithmetic number, because the mean of its divisors is an integer number (60860326293).

Almost surely, 2^243400412201 is an apocalyptic number.

It is an amenable number.

243400412201 is a deficient number, since it is larger than the sum of its proper divisors (40892971).

243400412201 is an equidigital number, since it uses as much as digits as its factorization.

243400412201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40892970.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 243400412201 its reverse (102214004342), we get a palindrome (345614416543).

The spelling of 243400412201 in words is "two hundred forty-three billion, four hundred million, four hundred twelve thousand, two hundred one".