4243210422509 has 2 divisors, whose sum is σ = 4243210422510. Its totient is φ = 4243210422508.

The previous prime is 4243210422349. The next prime is 4243210422523. The reversal of 4243210422509 is 9052240123424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4037346769225 + 205863653284 = 2009315^2 + 453722^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4243210422509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4243210422109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121605211254 + 2121605211255.

It is an arithmetic number, because the mean of its divisors is an integer number (2121605211255).

Almost surely, 2^{4243210422509} is an apocalyptic number.

It is an amenable number.

4243210422509 is a deficient number, since it is larger than the sum of its proper divisors (1).

4243210422509 is an equidigital number, since it uses as much as digits as its factorization.

4243210422509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 4243210422509 in words is "four trillion, two hundred forty-three billion, two hundred ten million, four hundred twenty-two thousand, five hundred nine".