243305452129 has 2 divisors, whose sum is σ = 243305452130. Its totient is φ = 243305452128.

The previous prime is 243305452121. The next prime is 243305452189. The reversal of 243305452129 is 921254503342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214355110225 + 28950341904 = 462985^2 + 170148^2 .

It is a cyclic number.

It is not a de Polignac number, because 243305452129 - 2³ = 243305452121 is a prime.

It is a super-2 number, since 2×243305452129² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243305452091 and 243305452100.

It is not a weakly prime, because it can be changed into another prime (243305452121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121652726064 + 121652726065.

It is an arithmetic number, because the mean of its divisors is an integer number (121652726065).

Almost surely, 2^243305452129 is an apocalyptic number.

It is an amenable number.

243305452129 is a deficient number, since it is larger than the sum of its proper divisors (1).

243305452129 is an equidigital number, since it uses as much as digits as its factorization.

243305452129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 243305452129 in words is "two hundred forty-three billion, three hundred five million, four hundred fifty-two thousand, one hundred twenty-nine".