53335561 has 2 divisors, whose sum is σ = 53335562. Its totient is φ = 53335560.

The previous prime is 53335549. The next prime is 53335571. The reversal of 53335561 is 16553335.

It is a happy number.

53335561 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., 29909961 + 23425600 = 5469^2 + 4840^2 .

It is a cyclic number.

It is not a de Polignac number, because 53335561 - 2⁹ = 53335049 is a prime.

It is not a weakly prime, because it can be changed into another prime (53335501) 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, 26667780 + 26667781.

It is an arithmetic number, because the mean of its divisors is an integer number (26667781).

Almost surely, 2^53335561 is an apocalyptic number.

It is an amenable number.

53335561 is a deficient number, since it is larger than the sum of its proper divisors (1).

53335561 is an equidigital number, since it uses as much as digits as its factorization.

53335561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20250, while the sum is 31.

The square root of 53335561 is about 7303.1199497201. The cubic root of 53335561 is about 376.4196522659.

Adding to 53335561 its reverse (16553335), we get a palindrome (69888896).

The spelling of 53335561 in words is "fifty-three million, three hundred thirty-five thousand, five hundred sixty-one".