50813281 has 2 divisors, whose sum is σ = 50813282. Its totient is φ = 50813280.

The previous prime is 50813263. The next prime is 50813311. The reversal of 50813281 is 18231805.

50813281 = 5040² + 5041².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25411681 + 25401600 = 5041^2 + 5040^2 .

It is a cyclic number.

It is not a de Polignac number, because 50813281 - 2¹³ = 50805089 is a prime.

It is a super-2 number, since 2×50813281² = 5163979051969922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (50813261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25406640 + 25406641.

It is an arithmetic number, because the mean of its divisors is an integer number (25406641).

Almost surely, 2^50813281 is an apocalyptic number.

50813281 is the 5041-st centered square number.

It is an amenable number.

50813281 is a deficient number, since it is larger than the sum of its proper divisors (1).

50813281 is an equidigital number, since it uses as much as digits as its factorization.

50813281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 50813281 is about 7128.3434962128. The cubic root of 50813281 is about 370.3898520521.

The spelling of 50813281 in words is "fifty million, eight hundred thirteen thousand, two hundred eighty-one".