50018161 has 2 divisors, whose sum is σ = 50018162. Its totient is φ = 50018160.

The previous prime is 50018119. The next prime is 50018173. The reversal of 50018161 is 16181005.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44635761 + 5382400 = 6681^2 + 2320^2 .

It is a cyclic number.

It is not a de Polignac number, because 50018161 - 2¹³ = 50009969 is a prime.

It is not a weakly prime, because it can be changed into another prime (50018461) 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, 25009080 + 25009081.

It is an arithmetic number, because the mean of its divisors is an integer number (25009081).

Almost surely, 2^50018161 is an apocalyptic number.

It is an amenable number.

50018161 is a deficient number, since it is larger than the sum of its proper divisors (1).

50018161 is an equidigital number, since it uses as much as digits as its factorization.

50018161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 50018161 is about 7072.3518719023. The cubic root of 50018161 is about 368.4477482622.

Adding to 50018161 its reverse (16181005), we get a palindrome (66199166).

The spelling of 50018161 in words is "fifty million, eighteen thousand, one hundred sixty-one".