27132221 has 4 divisors (see below), whose sum is σ = 28728252.
Its totient is φ = 25536192.
The previous prime is 27132199. The next prime is 27132227. The reversal of 27132221 is 12223172.
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 12348196 + 14784025 = 3514^2 + 3845^2
It is a cyclic number.
It is not a de Polignac number, because 27132221 - 210 = 27131197 is a prime.
It is a fibodiv number, since the Fibonacci-like sequence with seeds 27132 and 221 contains 27132221 itself.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 27132193 and 27132202.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (27132227) 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, 797990 + ... + 798023.
It is an arithmetic number, because the mean of its divisors is an integer number (7182063).
Almost surely, 227132221 is an apocalyptic number.
It is an amenable number.
27132221 is a deficient number, since it is larger than the sum of its proper divisors (1596031).
27132221 is a wasteful number, since it uses less digits than its factorization.
27132221 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1596030.
The product of its digits is 336, while the sum is 20.
The square root of 27132221 is about 5208.8598560530.
The cubic root of 27132221 is about 300.4889101973.
Adding to 27132221 its reverse (12223172), we get a palindrome (39355393).
The spelling of 27132221 in words is "twenty-seven million, one hundred thirty-two thousand, two hundred twenty-one".