27236221 has 2 divisors, whose sum is σ = 27236222. Its totient is φ = 27236220.

The previous prime is 27236219. The next prime is 27236233. The reversal of 27236221 is 12263272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14175225 + 13060996 = 3765^2 + 3614^2 .

It is a cyclic number.

It is not a de Polignac number, because 27236221 - 2¹ = 27236219 is a prime.

Together with 27236219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27236281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13618110 + 13618111.

It is an arithmetic number, because the mean of its divisors is an integer number (13618111).

Almost surely, 2^27236221 is an apocalyptic number.

It is an amenable number.

27236221 is a deficient number, since it is larger than the sum of its proper divisors (1).

27236221 is an equidigital number, since it uses as much as digits as its factorization.

27236221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 25.

The square root of 27236221 is about 5218.8332987364. The cubic root of 27236221 is about 300.8723534653.

Adding to 27236221 its reverse (12263272), we get a palindrome (39499493).

The spelling of 27236221 in words is "twenty-seven million, two hundred thirty-six thousand, two hundred twenty-one".