50015591 has 4 divisors (see below), whose sum is σ = 50236152. Its totient is φ = 49795032.

The previous prime is 50015573. The next prime is 50015599. The reversal of 50015591 is 19551005.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19551005 = 5 ⋅3910201.

It is a cyclic number.

It is not a de Polignac number, because 50015591 - 2¹⁰ = 50014567 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 50015591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50015599) 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, 109940 + ... + 110393.

It is an arithmetic number, because the mean of its divisors is an integer number (12559038).

Almost surely, 2^50015591 is an apocalyptic number.

50015591 is a deficient number, since it is larger than the sum of its proper divisors (220561).

50015591 is a wasteful number, since it uses less digits than its factorization.

50015591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220560.

The product of its (nonzero) digits is 1125, while the sum is 26.

The square root of 50015591 is about 7072.1701761199. The cubic root of 50015591 is about 368.4414377081.

Adding to 50015591 its reverse (19551005), we get a palindrome (69566596).

The spelling of 50015591 in words is "fifty million, fifteen thousand, five hundred ninety-one".