523542560452321 has 2 divisors, whose sum is σ = 523542560452322. Its totient is φ = 523542560452320.

The previous prime is 523542560452319. The next prime is 523542560452367. The reversal of 523542560452321 is 123254065245325.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 470783242051600 + 52759318400721 = 21697540^2 + 7263561^2 .

It is a cyclic number.

It is not a de Polignac number, because 523542560452321 - 2¹ = 523542560452319 is a prime.

It is a super-2 number, since 2×523542560452321² (a number of 30 digits) contains 22 as substring.

Together with 523542560452319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (523542561452321) 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, 261771280226160 + 261771280226161.

It is an arithmetic number, because the mean of its divisors is an integer number (261771280226161).

Almost surely, 2^{523542560452321} is an apocalyptic number.

It is an amenable number.

523542560452321 is a deficient number, since it is larger than the sum of its proper divisors (1).

523542560452321 is an equidigital number, since it uses as much as digits as its factorization.

523542560452321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640000, while the sum is 49.

The spelling of 523542560452321 in words is "five hundred twenty-three trillion, five hundred forty-two billion, five hundred sixty million, four hundred fifty-two thousand, three hundred twenty-one".