521513540063 has 2 divisors, whose sum is σ = 521513540064. Its totient is φ = 521513540062.

The previous prime is 521513540057. The next prime is 521513540069. The reversal of 521513540063 is 360045315125.

It is a balanced prime because it is at equal distance from previous prime (521513540057) and next prime (521513540069).

It is a cyclic number.

It is not a de Polignac number, because 521513540063 - 2¹⁰ = 521513539039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521513540069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260756770031 + 260756770032.

It is an arithmetic number, because the mean of its divisors is an integer number (260756770032).

Almost surely, 2^521513540063 is an apocalyptic number.

521513540063 is a deficient number, since it is larger than the sum of its proper divisors (1).

521513540063 is an equidigital number, since it uses as much as digits as its factorization.

521513540063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 35.

Adding to 521513540063 its reverse (360045315125), we get a palindrome (881558855188).

The spelling of 521513540063 in words is "five hundred twenty-one billion, five hundred thirteen million, five hundred forty thousand, sixty-three".