53516557 has 2 divisors, whose sum is σ = 53516558. Its totient is φ = 53516556.

The previous prime is 53516531. The next prime is 53516579. The reversal of 53516557 is 75561535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51926436 + 1590121 = 7206^2 + 1261^2 .

It is a cyclic number.

It is not a de Polignac number, because 53516557 - 2¹¹ = 53514509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53514557) 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, 26758278 + 26758279.

It is an arithmetic number, because the mean of its divisors is an integer number (26758279).

Almost surely, 2^53516557 is an apocalyptic number.

It is an amenable number.

53516557 is a deficient number, since it is larger than the sum of its proper divisors (1).

53516557 is an equidigital number, since it uses as much as digits as its factorization.

53516557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78750, while the sum is 37.

The square root of 53516557 is about 7315.5011448294. The cubic root of 53516557 is about 376.8449690553.

The spelling of 53516557 in words is "fifty-three million, five hundred sixteen thousand, five hundred fifty-seven".