4243222321409 has 2 divisors, whose sum is σ = 4243222321410. Its totient is φ = 4243222321408.

The previous prime is 4243222321363. The next prime is 4243222321411. The reversal of 4243222321409 is 9041232223424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4182319485184 + 60902836225 = 2045072^2 + 246785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4243222321409 is a prime.

Together with 4243222321411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4243222321439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121611160704 + 2121611160705.

It is an arithmetic number, because the mean of its divisors is an integer number (2121611160705).

Almost surely, 2^{4243222321409} is an apocalyptic number.

It is an amenable number.

4243222321409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4243222321409 is an equidigital number, since it uses as much as digits as its factorization.

4243222321409 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 38.

The spelling of 4243222321409 in words is "four trillion, two hundred forty-three billion, two hundred twenty-two million, three hundred twenty-one thousand, four hundred nine".