27224221 has 4 divisors (see below), whose sum is σ = 27240444. Its totient is φ = 27208000.

The previous prime is 27224209. The next prime is 27224227. The reversal of 27224221 is 12242272.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1071225 + 26152996 = 1035^2 + 5114^2 .

It is a cyclic number.

It is not a de Polignac number, because 27224221 - 2⁵ = 27224189 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27224192 and 27224201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27224227) 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, 5260 + ... + 9061.

It is an arithmetic number, because the mean of its divisors is an integer number (6810111).

Almost surely, 2^27224221 is an apocalyptic number.

It is an amenable number.

27224221 is a deficient number, since it is larger than the sum of its proper divisors (16223).

27224221 is a wasteful number, since it uses less digits than its factorization.

27224221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16222.

The product of its digits is 896, while the sum is 22.

The square root of 27224221 is about 5217.6834898257. The cubic root of 27224221 is about 300.8281598818.

Adding to 27224221 its reverse (12242272), we get a palindrome (39466493).

The spelling of 27224221 in words is "twenty-seven million, two hundred twenty-four thousand, two hundred twenty-one".