50191 has 4 divisors (see below), whose sum is σ = 51192. Its totient is φ = 49192.
The previous prime is 50177. The next prime is 50207. The reversal of 50191 is 19105.
50191 is nontrivially palindromic in base 9.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19105 = 5 ⋅3821.
It is a cyclic number.
It is not a de Polignac number, because 50191 - 25 = 50159 is a prime.
It is a Duffinian number.
50191 is an undulating number in base 9.
It is a plaindrome in base 11.
It is a nialpdrome in base 15.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (50101) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421 + ... + 526.
It is an arithmetic number, because the mean of its divisors is an integer number (12798).
250191 is an apocalyptic number.
50191 is a deficient number, since it is larger than the sum of its proper divisors (1001).
50191 is an equidigital number, since it uses as much as digits as its factorization.
50191 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1000.
The product of its (nonzero) digits is 45, while the sum is 16.
The square root of 50191 is about 224.0334796409. The cubic root of 50191 is about 36.8871653819.
Adding to 50191 its reverse (19105), we get a palindrome (69296).
The spelling of 50191 in words is "fifty thousand, one hundred ninety-one".
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