52535543521 has 2 divisors, whose sum is σ = 52535543522. Its totient is φ = 52535543520.

The previous prime is 52535543509. The next prime is 52535543569. The reversal of 52535543521 is 12534553525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48587180625 + 3948362896 = 220425^2 + 62836^2 .

It is a cyclic number.

It is not a de Polignac number, because 52535543521 - 2²³ = 52527154913 is a prime.

It is not a weakly prime, because it can be changed into another prime (52535541521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26267771760 + 26267771761.

It is an arithmetic number, because the mean of its divisors is an integer number (26267771761).

Almost surely, 2^52535543521 is an apocalyptic number.

It is an amenable number.

52535543521 is a deficient number, since it is larger than the sum of its proper divisors (1).

52535543521 is an equidigital number, since it uses as much as digits as its factorization.

52535543521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 450000, while the sum is 40.

The spelling of 52535543521 in words is "fifty-two billion, five hundred thirty-five million, five hundred forty-three thousand, five hundred twenty-one".