53512561 has 2 divisors, whose sum is σ = 53512562. Its totient is φ = 53512560.

The previous prime is 53512523. The next prime is 53512579. The reversal of 53512561 is 16521535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36372961 + 17139600 = 6031^2 + 4140^2 .

It is a cyclic number.

It is not a de Polignac number, because 53512561 - 2⁹ = 53512049 is a prime.

It is not a weakly prime, because it can be changed into another prime (53512861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26756280 + 26756281.

It is an arithmetic number, because the mean of its divisors is an integer number (26756281).

Almost surely, 2^53512561 is an apocalyptic number.

It is an amenable number.

53512561 is a deficient number, since it is larger than the sum of its proper divisors (1).

53512561 is an equidigital number, since it uses as much as digits as its factorization.

53512561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4500, while the sum is 28.

The square root of 53512561 is about 7315.2280210531. The cubic root of 53512561 is about 376.8355893415.

The spelling of 53512561 in words is "fifty-three million, five hundred twelve thousand, five hundred sixty-one".