50513891 has 2 divisors, whose sum is σ = 50513892. Its totient is φ = 50513890.

The previous prime is 50513887. The next prime is 50513921. The reversal of 50513891 is 19831505.

50513891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50513891 - 2² = 50513887 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (50513791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25256945 + 25256946.

It is an arithmetic number, because the mean of its divisors is an integer number (25256946).

Almost surely, 2^50513891 is an apocalyptic number.

50513891 is a deficient number, since it is larger than the sum of its proper divisors (1).

50513891 is an equidigital number, since it uses as much as digits as its factorization.

50513891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 50513891 is about 7107.3125019236. The cubic root of 50513891 is about 369.6609775012.

The spelling of 50513891 in words is "fifty million, five hundred thirteen thousand, eight hundred ninety-one".