27228191 has 4 divisors (see below), whose sum is σ = 27508992. Its totient is φ = 26947392.

The previous prime is 27228151. The next prime is 27228209. The reversal of 27228191 is 19182272.

It is a happy number.

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 27228191 - 2²² = 23033887 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 (27228151) 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, 140255 + ... + 140448.

It is an arithmetic number, because the mean of its divisors is an integer number (6877248).

Almost surely, 2^27228191 is an apocalyptic number.

27228191 is a deficient number, since it is larger than the sum of its proper divisors (280801).

27228191 is an equidigital number, since it uses as much as digits as its factorization.

27228191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280800.

The product of its digits is 4032, while the sum is 32.

The square root of 27228191 is about 5218.0639129854. The cubic root of 27228191 is about 300.8427820296.

The spelling of 27228191 in words is "twenty-seven million, two hundred twenty-eight thousand, one hundred ninety-one".