243210204361 has 2 divisors, whose sum is σ = 243210204362. Its totient is φ = 243210204360.

The previous prime is 243210204331. The next prime is 243210204371. The reversal of 243210204361 is 163402012342.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225473025600 + 17737178761 = 474840^2 + 133181^2 .

It is a cyclic number.

It is not a de Polignac number, because 243210204361 - 2⁹ = 243210203849 is a prime.

It is not a weakly prime, because it can be changed into another prime (243210204331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121605102180 + 121605102181.

It is an arithmetic number, because the mean of its divisors is an integer number (121605102181).

Almost surely, 2^243210204361 is an apocalyptic number.

It is an amenable number.

243210204361 is a deficient number, since it is larger than the sum of its proper divisors (1).

243210204361 is an equidigital number, since it uses as much as digits as its factorization.

243210204361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

The spelling of 243210204361 in words is "two hundred forty-three billion, two hundred ten million, two hundred four thousand, three hundred sixty-one".