53457281 has 2 divisors, whose sum is σ = 53457282. Its totient is φ = 53457280.

The previous prime is 53457259. The next prime is 53457343. The reversal of 53457281 is 18275435.

It is a happy number.

53457281 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., 53290000 + 167281 = 7300^2 + 409^2 .

It is a cyclic number.

It is not a de Polignac number, because 53457281 - 2¹⁸ = 53195137 is a prime.

It is a super-2 number, since 2×53457281² = 5715361783825922, which contains 22 as substring.

It is equal to p_3195764 and since 53457281 and 3195764 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (53457211) 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, 26728640 + 26728641.

It is an arithmetic number, because the mean of its divisors is an integer number (26728641).

Almost surely, 2^53457281 is an apocalyptic number.

It is an amenable number.

53457281 is a deficient number, since it is larger than the sum of its proper divisors (1).

53457281 is an equidigital number, since it uses as much as digits as its factorization.

53457281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33600, while the sum is 35.

The square root of 53457281 is about 7311.4486252726. The cubic root of 53457281 is about 376.7057840006.

The spelling of 53457281 in words is "fifty-three million, four hundred fifty-seven thousand, two hundred eighty-one".