506426431321 has 2 divisors, whose sum is σ = 506426431322. Its totient is φ = 506426431320.

The previous prime is 506426431279. The next prime is 506426431387. The reversal of 506426431321 is 123134624605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 490649815296 + 15776616025 = 700464^2 + 125605^2 .

It is a cyclic number.

It is not a de Polignac number, because 506426431321 - 2¹¹ = 506426429273 is a prime.

It is not a weakly prime, because it can be changed into another prime (506426438321) 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, 253213215660 + 253213215661.

It is an arithmetic number, because the mean of its divisors is an integer number (253213215661).

Almost surely, 2^506426431321 is an apocalyptic number.

It is an amenable number.

506426431321 is a deficient number, since it is larger than the sum of its proper divisors (1).

506426431321 is an equidigital number, since it uses as much as digits as its factorization.

506426431321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 506426431321 in words is "five hundred six billion, four hundred twenty-six million, four hundred thirty-one thousand, three hundred twenty-one".