54243281 has 2 divisors, whose sum is σ = 54243282. Its totient is φ = 54243280.

The previous prime is 54243263. The next prime is 54243283. The reversal of 54243281 is 18234245.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50183056 + 4060225 = 7084^2 + 2015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54243281 is a prime.

It is a super-2 number, since 2×54243281² = 5884667067289922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 54243283, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (54243283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27121640 + 27121641.

It is an arithmetic number, because the mean of its divisors is an integer number (27121641).

Almost surely, 2^54243281 is an apocalyptic number.

It is an amenable number.

54243281 is a deficient number, since it is larger than the sum of its proper divisors (1).

54243281 is an equidigital number, since it uses as much as digits as its factorization.

54243281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 29.

The square root of 54243281 is about 7365.0038017641. The cubic root of 54243281 is about 378.5430847789.

The spelling of 54243281 in words is "fifty-four million, two hundred forty-three thousand, two hundred eighty-one".