50231591 has 4 divisors (see below), whose sum is σ = 50245800. Its totient is φ = 50217384.

The previous prime is 50231581. The next prime is 50231593. The reversal of 50231591 is 19513205.

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, and also an emirpimes, since its reverse is a distinct semiprime: 19513205 = 5 ⋅3902641.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50231591 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50231591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50231593) 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 in 3 ways as a sum of consecutive naturals, for example, 2825 + ... + 10413.

It is an arithmetic number, because the mean of its divisors is an integer number (12561450).

Almost surely, 2^50231591 is an apocalyptic number.

50231591 is a deficient number, since it is larger than the sum of its proper divisors (14209).

50231591 is an equidigital number, since it uses as much as digits as its factorization.

50231591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14208.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 50231591 is about 7087.4248496898. The cubic root of 50231591 is about 368.9710662948.

Adding to 50231591 its reverse (19513205), we get a palindrome (69744796).

The spelling of 50231591 in words is "fifty million, two hundred thirty-one thousand, five hundred ninety-one".