243320124461 has 2 divisors, whose sum is σ = 243320124462. Its totient is φ = 243320124460.

The previous prime is 243320124419. The next prime is 243320124529. The reversal of 243320124461 is 164421023342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126078255625 + 117241868836 = 355075^2 + 342406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243320124461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243320126461) 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, 121660062230 + 121660062231.

It is an arithmetic number, because the mean of its divisors is an integer number (121660062231).

Almost surely, 2^243320124461 is an apocalyptic number.

It is an amenable number.

243320124461 is a deficient number, since it is larger than the sum of its proper divisors (1).

243320124461 is an equidigital number, since it uses as much as digits as its factorization.

243320124461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 32.

The spelling of 243320124461 in words is "two hundred forty-three billion, three hundred twenty million, one hundred twenty-four thousand, four hundred sixty-one".