243310020049 has 2 divisors, whose sum is σ = 243310020050. Its totient is φ = 243310020048.

The previous prime is 243310019993. The next prime is 243310020067. The reversal of 243310020049 is 940020013342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243305427600 + 4592449 = 493260^2 + 2143^2 .

It is a cyclic number.

It is not a de Polignac number, because 243310020049 - 2²⁵ = 243276465617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243310019999 and 243310020026.

It is not a weakly prime, because it can be changed into another prime (243310020649) 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, 121655010024 + 121655010025.

It is an arithmetic number, because the mean of its divisors is an integer number (121655010025).

Almost surely, 2^243310020049 is an apocalyptic number.

It is an amenable number.

243310020049 is a deficient number, since it is larger than the sum of its proper divisors (1).

243310020049 is an equidigital number, since it uses as much as digits as its factorization.

243310020049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 243310020049 in words is "two hundred forty-three billion, three hundred ten million, twenty thousand, forty-nine".