27116221 has 6 divisors (see below), whose sum is σ = 29805566. Its totient is φ = 24651000.

The previous prime is 27116213. The next prime is 27116233. The reversal of 27116221 is 12261172.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 24393721 + 2722500 = 4939^2 + 1650^2 .

It is not a de Polignac number, because 27116221 - 2³ = 27116213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27116192 and 27116201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27116281) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111930 + ... + 112171.

Almost surely, 2^27116221 is an apocalyptic number.

It is an amenable number.

27116221 is a deficient number, since it is larger than the sum of its proper divisors (2689345).

27116221 is a wasteful number, since it uses less digits than its factorization.

27116221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224123 (or 224112 counting only the distinct ones).

The product of its digits is 336, while the sum is 22.

The square root of 27116221 is about 5207.3237848246. The cubic root of 27116221 is about 300.4298320022.

Adding to 27116221 its reverse (12261172), we get a palindrome (39377393).

The spelling of 27116221 in words is "twenty-seven million, one hundred sixteen thousand, two hundred twenty-one".