4228191 has 12 divisors (see below), whose sum is σ = 6662760. Its totient is φ = 2562480.

The previous prime is 4228177. The next prime is 4228199. The reversal of 4228191 is 1918224.

It is not a de Polignac number, because 4228191 - 2²¹ = 2131039 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4228199) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21256 + ... + 21453.

It is an arithmetic number, because the mean of its divisors is an integer number (555230).

Almost surely, 2^4228191 is an apocalyptic number.

4228191 is a deficient number, since it is larger than the sum of its proper divisors (2434569).

4228191 is a wasteful number, since it uses less digits than its factorization.

4228191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42726 (or 42723 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 4228191 is about 2056.2565501415. The cubic root of 4228191 is about 161.7030453909.

The spelling of 4228191 in words is "four million, two hundred twenty-eight thousand, one hundred ninety-one".