50811281 has 2 divisors, whose sum is σ = 50811282. Its totient is φ = 50811280.

The previous prime is 50811217. The next prime is 50811287. The reversal of 50811281 is 18211805.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45900625 + 4910656 = 6775^2 + 2216^2 .

It is a cyclic number.

It is not a de Polignac number, because 50811281 - 2⁶ = 50811217 is a prime.

It is a super-2 number, since 2×50811281² = 5163572553721922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 50811281.

It is not a weakly prime, because it can be changed into another prime (50811287) 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, 25405640 + 25405641.

It is an arithmetic number, because the mean of its divisors is an integer number (25405641).

Almost surely, 2^50811281 is an apocalyptic number.

It is an amenable number.

50811281 is a deficient number, since it is larger than the sum of its proper divisors (1).

50811281 is an equidigital number, since it uses as much as digits as its factorization.

50811281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 26.

The square root of 50811281 is about 7128.2032097858. The cubic root of 50811281 is about 370.3849924996.

The spelling of 50811281 in words is "fifty million, eight hundred eleven thousand, two hundred eighty-one".