50110991 has 4 divisors (see below), whose sum is σ = 57269712. Its totient is φ = 42952272.

The previous prime is 50110981. The next prime is 50111003. The reversal of 50110991 is 19901105.

It is a happy number.

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-50110991 is a prime.

It is a super-2 number, since 2×50110991² = 5022222838004162, 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 50110991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50110981) 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, 3579350 + ... + 3579363.

It is an arithmetic number, because the mean of its divisors is an integer number (14317428).

Almost surely, 2^50110991 is an apocalyptic number.

50110991 is a deficient number, since it is larger than the sum of its proper divisors (7158721).

50110991 is an equidigital number, since it uses as much as digits as its factorization.

50110991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7158720.

The product of its (nonzero) digits is 405, while the sum is 26.

The square root of 50110991 is about 7078.9117101430. The cubic root of 50110991 is about 368.6755446343.

The spelling of 50110991 in words is "fifty million, one hundred ten thousand, nine hundred ninety-one".