50115281 has 2 divisors, whose sum is σ = 50115282. Its totient is φ = 50115280.

The previous prime is 50115223. The next prime is 50115283. The reversal of 50115281 is 18251105.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46444225 + 3671056 = 6815^2 + 1916^2 .

It is a cyclic number.

It is not a de Polignac number, because 50115281 - 2¹⁸ = 49853137 is a prime.

It is a super-2 number, since 2×50115281² = 5023082779417922, which contains 22 as substring.

Together with 50115283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (50115283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25057640 + 25057641.

It is an arithmetic number, because the mean of its divisors is an integer number (25057641).

Almost surely, 2^50115281 is an apocalyptic number.

It is an amenable number.

50115281 is a deficient number, since it is larger than the sum of its proper divisors (1).

50115281 is an equidigital number, since it uses as much as digits as its factorization.

50115281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 50115281 is about 7079.2147163368. The cubic root of 50115281 is about 368.6860651004.

Adding to 50115281 its reverse (18251105), we get a palindrome (68366386).

The spelling of 50115281 in words is "fifty million, one hundred fifteen thousand, two hundred eighty-one".