243110550409 has 2 divisors, whose sum is σ = 243110550410. Its totient is φ = 243110550408.

The previous prime is 243110550317. The next prime is 243110550443. The reversal of 243110550409 is 904055011342.

It is an a-pointer prime, because the next prime (243110550443) can be obtained adding 243110550409 to its sum of digits (34).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128593960000 + 114516590409 = 358600^2 + 338403^2 .

It is a cyclic number.

It is not a de Polignac number, because 243110550409 - 2¹³ = 243110542217 is a prime.

It is not a weakly prime, because it can be changed into another prime (243110554409) 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, 121555275204 + 121555275205.

It is an arithmetic number, because the mean of its divisors is an integer number (121555275205).

Almost surely, 2^243110550409 is an apocalyptic number.

It is an amenable number.

243110550409 is a deficient number, since it is larger than the sum of its proper divisors (1).

243110550409 is an equidigital number, since it uses as much as digits as its factorization.

243110550409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 243110550409 in words is "two hundred forty-three billion, one hundred ten million, five hundred fifty thousand, four hundred nine".