243122552539 has 2 divisors, whose sum is σ = 243122552540. Its totient is φ = 243122552538.

The previous prime is 243122552537. The next prime is 243122552567. The reversal of 243122552539 is 935255221342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243122552539 - 2¹ = 243122552537 is a prime.

Together with 243122552537, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 243122552495 and 243122552504.

It is not a weakly prime, because it can be changed into another prime (243122552531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121561276269 + 121561276270.

It is an arithmetic number, because the mean of its divisors is an integer number (121561276270).

Almost surely, 2^243122552539 is an apocalyptic number.

243122552539 is a deficient number, since it is larger than the sum of its proper divisors (1).

243122552539 is an equidigital number, since it uses as much as digits as its factorization.

243122552539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648000, while the sum is 43.

The spelling of 243122552539 in words is "two hundred forty-three billion, one hundred twenty-two million, five hundred fifty-two thousand, five hundred thirty-nine".