50118221 has 2 divisors, whose sum is σ = 50118222. Its totient is φ = 50118220.

The previous prime is 50118191. The next prime is 50118269. The reversal of 50118221 is 12281105.

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., 49140100 + 978121 = 7010^2 + 989^2 .

It is a cyclic number.

It is not a de Polignac number, because 50118221 - 2⁶ = 50118157 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 50118193 and 50118202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50118281) 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, 25059110 + 25059111.

It is an arithmetic number, because the mean of its divisors is an integer number (25059111).

Almost surely, 2^50118221 is an apocalyptic number.

It is an amenable number.

50118221 is a deficient number, since it is larger than the sum of its proper divisors (1).

50118221 is an equidigital number, since it uses as much as digits as its factorization.

50118221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 50118221 is about 7079.4223634418. The cubic root of 50118221 is about 368.6932745837.

Adding to 50118221 its reverse (12281105), we get a palindrome (62399326).

The spelling of 50118221 in words is "fifty million, one hundred eighteen thousand, two hundred twenty-one".