50918191 has 4 divisors (see below), whose sum is σ = 51678232. Its totient is φ = 50158152.

The previous prime is 50918183. The next prime is 50918201. The reversal of 50918191 is 19181905.

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

It is a cyclic number.

It is not a de Polignac number, because 50918191 - 2³ = 50918183 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 (50918891) 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, 379920 + ... + 380053.

It is an arithmetic number, because the mean of its divisors is an integer number (12919558).

Almost surely, 2^50918191 is an apocalyptic number.

50918191 is a deficient number, since it is larger than the sum of its proper divisors (760041).

50918191 is an equidigital number, since it uses as much as digits as its factorization.

50918191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760040.

The product of its (nonzero) digits is 3240, while the sum is 34.

The square root of 50918191 is about 7135.6983540506. The cubic root of 50918191 is about 370.6445813094.

The spelling of 50918191 in words is "fifty million, nine hundred eighteen thousand, one hundred ninety-one".