53557481 has 2 divisors, whose sum is σ = 53557482. Its totient is φ = 53557480.

The previous prime is 53557457. The next prime is 53557529. The reversal of 53557481 is 18475535.

53557481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42133081 + 11424400 = 6491^2 + 3380^2 .

It is a cyclic number.

It is not a de Polignac number, because 53557481 - 2⁶ = 53557417 is a prime.

It is a super-2 number, since 2×53557481² = 5736807542130722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53557421) 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, 26778740 + 26778741.

It is an arithmetic number, because the mean of its divisors is an integer number (26778741).

Almost surely, 2^53557481 is an apocalyptic number.

It is an amenable number.

53557481 is a deficient number, since it is larger than the sum of its proper divisors (1).

53557481 is an equidigital number, since it uses as much as digits as its factorization.

53557481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84000, while the sum is 38.

The square root of 53557481 is about 7318.2976845712. The cubic root of 53557481 is about 376.9410021025.

The spelling of 53557481 in words is "fifty-three million, five hundred fifty-seven thousand, four hundred eighty-one".