50831791 has 4 divisors (see below), whose sum is σ = 50846184. Its totient is φ = 50817400.

The previous prime is 50831779. The next prime is 50831813. The reversal of 50831791 is 19713805.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 50831791 - 2⁹ = 50831279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50831701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2136 + ... + 10306.

It is an arithmetic number, because the mean of its divisors is an integer number (12711546).

Almost surely, 2^50831791 is an apocalyptic number.

50831791 is a deficient number, since it is larger than the sum of its proper divisors (14393).

50831791 is an equidigital number, since it uses as much as digits as its factorization.

50831791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14392.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 50831791 is about 7129.6417161033. The cubic root of 50831791 is about 370.4348211607.

The spelling of 50831791 in words is "fifty million, eight hundred thirty-one thousand, seven hundred ninety-one".