243245509229 has 2 divisors, whose sum is σ = 243245509230. Its totient is φ = 243245509228.

The previous prime is 243245509207. The next prime is 243245509231. The reversal of 243245509229 is 922905542342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229558849129 + 13686660100 = 479123^2 + 116990^2 .

It is a cyclic number.

It is not a de Polignac number, because 243245509229 - 2²⁰ = 243244460653 is a prime.

Together with 243245509231, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243245502229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121622754614 + 121622754615.

It is an arithmetic number, because the mean of its divisors is an integer number (121622754615).

Almost surely, 2^243245509229 is an apocalyptic number.

It is an amenable number.

243245509229 is a deficient number, since it is larger than the sum of its proper divisors (1).

243245509229 is an equidigital number, since it uses as much as digits as its factorization.

243245509229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 243245509229 in words is "two hundred forty-three billion, two hundred forty-five million, five hundred nine thousand, two hundred twenty-nine".