54557281 has 2 divisors, whose sum is σ = 54557282. Its totient is φ = 54557280.

The previous prime is 54557257. The next prime is 54557287. The reversal of 54557281 is 18275545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53056656 + 1500625 = 7284^2 + 1225^2 .

It is a cyclic number.

It is not a de Polignac number, because 54557281 - 2⁵ = 54557249 is a prime.

It is a super-2 number, since 2×54557281² = 5952993820225922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 54557281.

It is not a weakly prime, because it can be changed into another prime (54557287) 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, 27278640 + 27278641.

It is an arithmetic number, because the mean of its divisors is an integer number (27278641).

Almost surely, 2^54557281 is an apocalyptic number.

54557281 is the 4672-nd centered pentagonal number.

It is an amenable number.

54557281 is a deficient number, since it is larger than the sum of its proper divisors (1).

54557281 is an equidigital number, since it uses as much as digits as its factorization.

54557281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56000, while the sum is 37.

The square root of 54557281 is about 7386.2900701232. The cubic root of 54557281 is about 379.2721084578.

The spelling of 54557281 in words is "fifty-four million, five hundred fifty-seven thousand, two hundred eighty-one".