243320131342441 has 2 divisors, whose sum is σ = 243320131342442. Its totient is φ = 243320131342440.

The previous prime is 243320131342423. The next prime is 243320131342447. The reversal of 243320131342441 is 144243131023342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162697780132416 + 80622351210025 = 12755304^2 + 8978995^2 .

It is a cyclic number.

It is not a de Polignac number, because 243320131342441 - 2⁹ = 243320131341929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243320131342441.

It is not a weakly prime, because it can be changed into another prime (243320131342447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121660065671220 + 121660065671221.

It is an arithmetic number, because the mean of its divisors is an integer number (121660065671221).

Almost surely, 2^{243320131342441} is an apocalyptic number.

It is an amenable number.

243320131342441 is a deficient number, since it is larger than the sum of its proper divisors (1).

243320131342441 is an equidigital number, since it uses as much as digits as its factorization.

243320131342441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 37.

Adding to 243320131342441 its reverse (144243131023342), we get a palindrome (387563262365783).

The spelling of 243320131342441 in words is "two hundred forty-three trillion, three hundred twenty billion, one hundred thirty-one million, three hundred forty-two thousand, four hundred forty-one".