191050218 has 32 divisors (see below), whose sum is σ = 427627200. Its totient is φ = 63222768.

The previous prime is 191050217. The next prime is 191050261. The reversal of 191050218 is 812050191.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 191050191 and 191050200.

It is not an unprimeable number, because it can be changed into a prime (191050217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5221 + ... + 20232.

It is an arithmetic number, because the mean of its divisors is an integer number (13363350).

Almost surely, 2^191050218 is an apocalyptic number.

191050218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

191050218 is an abundant number, since it is smaller than the sum of its proper divisors (236576982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191050218 is a wasteful number, since it uses less digits than its factorization.

191050218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25603 (or 25597 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 191050218 is about 13822.0916651569. The cubic root of 191050218 is about 575.9469894791.

Subtracting from 191050218 its sum of digits (27), we obtain a palindrome (191050191).

The spelling of 191050218 in words is "one hundred ninety-one million, fifty thousand, two hundred eighteen".