557281 has 2 divisors, whose sum is σ = 557282. Its totient is φ = 557280.

The previous prime is 557273. The next prime is 557303. The reversal of 557281 is 182755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 341056 + 216225 = 584^2 + 465^2 .

It is a cyclic number.

It is not a de Polignac number, because 557281 - 2³ = 557273 is a prime.

It is a super-2 number, since 2×557281² = 621124225922, which contains 22 as substring.

557281 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (557201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278640 + 278641.

It is an arithmetic number, because the mean of its divisors is an integer number (278641).

2⁵⁵⁷²⁸¹ is an apocalyptic number.

It is an amenable number.

557281 is a deficient number, since it is larger than the sum of its proper divisors (1).

557281 is an equidigital number, since it uses as much as digits as its factorization.

557281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2800, while the sum is 28.

The square root of 557281 is about 746.5125585012. The cubic root of 557281 is about 82.2920874269.

It can be divided in two parts, 557 and 281, that added together give a palindrome (838).

The spelling of 557281 in words is "five hundred fifty-seven thousand, two hundred eighty-one".