53646521 has 2 divisors, whose sum is σ = 53646522. Its totient is φ = 53646520.

The previous prime is 53646503. The next prime is 53646533. The reversal of 53646521 is 12564635.

53646521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49505296 + 4141225 = 7036^2 + 2035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53646521 is a prime.

It is not a weakly prime, because it can be changed into another prime (53646721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26823260 + 26823261.

It is an arithmetic number, because the mean of its divisors is an integer number (26823261).

Almost surely, 2^53646521 is an apocalyptic number.

It is an amenable number.

53646521 is a deficient number, since it is larger than the sum of its proper divisors (1).

53646521 is an equidigital number, since it uses as much as digits as its factorization.

53646521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 32.

The square root of 53646521 is about 7324.3785401903. The cubic root of 53646521 is about 377.1497762010.

The spelling of 53646521 in words is "fifty-three million, six hundred forty-six thousand, five hundred twenty-one".