27027221 has 4 divisors (see below), whose sum is σ = 29106252. Its totient is φ = 24948192.

The previous prime is 27027211. The next prime is 27027233. The reversal of 27027221 is 12272072.

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 8008900 + 19018321 = 2830^2 + 4361^2 .

It is a cyclic number.

It is not a de Polignac number, because 27027221 - 2⁶ = 27027157 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 (27027211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1039496 + ... + 1039521.

It is an arithmetic number, because the mean of its divisors is an integer number (7276563).

Almost surely, 2^27027221 is an apocalyptic number.

It is an amenable number.

27027221 is a deficient number, since it is larger than the sum of its proper divisors (2079031).

27027221 is a wasteful number, since it uses less digits than its factorization.

27027221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079030.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 27027221 is about 5198.7711047901. The cubic root of 27027221 is about 300.1007846562.

Adding to 27027221 its reverse (12272072), we get a palindrome (39299293).

The spelling of 27027221 in words is "twenty-seven million, twenty-seven thousand, two hundred twenty-one".