52581281 has 2 divisors, whose sum is σ = 52581282. Its totient is φ = 52581280.

The previous prime is 52581271. The next prime is 52581293. The reversal of 52581281 is 18218525.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40960000 + 11621281 = 6400^2 + 3409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52581281 is a prime.

It is a super-2 number, since 2×52581281² = 5529582223201922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (52581211) 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, 26290640 + 26290641.

It is an arithmetic number, because the mean of its divisors is an integer number (26290641).

Almost surely, 2^52581281 is an apocalyptic number.

It is an amenable number.

52581281 is a deficient number, since it is larger than the sum of its proper divisors (1).

52581281 is an equidigital number, since it uses as much as digits as its factorization.

52581281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6400, while the sum is 32.

The square root of 52581281 is about 7251.2951257000. The cubic root of 52581281 is about 374.6367587810.

The spelling of 52581281 in words is "fifty-two million, five hundred eighty-one thousand, two hundred eighty-one".