4243521302513 has 2 divisors, whose sum is σ = 4243521302514. Its totient is φ = 4243521302512.

The previous prime is 4243521302477. The next prime is 4243521302597. The reversal of 4243521302513 is 3152031253424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4213138023649 + 30383278864 = 2052593^2 + 174308^2 .

It is a cyclic number.

It is not a de Polignac number, because 4243521302513 - 2¹² = 4243521298417 is a prime.

It is not a weakly prime, because it can be changed into another prime (4243541302513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121760651256 + 2121760651257.

It is an arithmetic number, because the mean of its divisors is an integer number (2121760651257).

Almost surely, 2^{4243521302513} is an apocalyptic number.

It is an amenable number.

4243521302513 is a deficient number, since it is larger than the sum of its proper divisors (1).

4243521302513 is an equidigital number, since it uses as much as digits as its factorization.

4243521302513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 4243521302513 its reverse (3152031253424), we get a palindrome (7395552555937).

The spelling of 4243521302513 in words is "four trillion, two hundred forty-three billion, five hundred twenty-one million, three hundred two thousand, five hundred thirteen".