50117831 has 4 divisors (see below), whose sum is σ = 50149632. Its totient is φ = 50086032.

The previous prime is 50117803. The next prime is 50117861. The reversal of 50117831 is 13871105.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50117831 is a prime.

It is a super-2 number, since 2×50117831² = 5023593968289122, which contains 22 as substring.

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 50117831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50117861) 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, 13406 + ... + 16731.

It is an arithmetic number, because the mean of its divisors is an integer number (12537408).

Almost surely, 2^50117831 is an apocalyptic number.

50117831 is a deficient number, since it is larger than the sum of its proper divisors (31801).

50117831 is a wasteful number, since it uses less digits than its factorization.

50117831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31800.

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 50117831 is about 7079.3948187681. The cubic root of 50117831 is about 368.6923182399.

Adding to 50117831 its reverse (13871105), we get a palindrome (63988936).

The spelling of 50117831 in words is "fifty million, one hundred seventeen thousand, eight hundred thirty-one".