243155205229 has 2 divisors, whose sum is σ = 243155205230. Its totient is φ = 243155205228.

The previous prime is 243155205217. The next prime is 243155205247. The reversal of 243155205229 is 922502551342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241079036004 + 2076169225 = 490998^2 + 45565^2 .

It is a cyclic number.

It is not a de Polignac number, because 243155205229 - 2¹³ = 243155197037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243155205191 and 243155205200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243155205299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121577602614 + 121577602615.

It is an arithmetic number, because the mean of its divisors is an integer number (121577602615).

Almost surely, 2^243155205229 is an apocalyptic number.

It is an amenable number.

243155205229 is a deficient number, since it is larger than the sum of its proper divisors (1).

243155205229 is an equidigital number, since it uses as much as digits as its factorization.

243155205229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 243155205229 in words is "two hundred forty-three billion, one hundred fifty-five million, two hundred five thousand, two hundred twenty-nine".