520430423212321 has 2 divisors, whose sum is σ = 520430423212322. Its totient is φ = 520430423212320.

The previous prime is 520430423212313. The next prime is 520430423212391. The reversal of 520430423212321 is 123212324034025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 263298133943296 + 257132289269025 = 16226464^2 + 16035345^2 .

It is a cyclic number.

It is not a de Polignac number, because 520430423212321 - 2³ = 520430423212313 is a prime.

It is not a weakly prime, because it can be changed into another prime (520430423212391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260215211606160 + 260215211606161.

It is an arithmetic number, because the mean of its divisors is an integer number (260215211606161).

Almost surely, 2^{520430423212321} is an apocalyptic number.

It is an amenable number.

520430423212321 is a deficient number, since it is larger than the sum of its proper divisors (1).

520430423212321 is an equidigital number, since it uses as much as digits as its factorization.

520430423212321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 520430423212321 its reverse (123212324034025), we get a palindrome (643642747246346).

The spelling of 520430423212321 in words is "five hundred twenty trillion, four hundred thirty billion, four hundred twenty-three million, two hundred twelve thousand, three hundred twenty-one".