27135221 has 8 divisors (see below), whose sum is σ = 27749760. Its totient is φ = 26525952.

The previous prime is 27135217. The next prime is 27135253. The reversal of 27135221 is 12253172.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27135221 - 2² = 27135217 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 (27135421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10196 + ... + 12578.

It is an arithmetic number, because the mean of its divisors is an integer number (3468720).

Almost surely, 2^27135221 is an apocalyptic number.

It is an amenable number.

27135221 is a deficient number, since it is larger than the sum of its proper divisors (614539).

27135221 is a wasteful number, since it uses less digits than its factorization.

27135221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2635.

The product of its digits is 840, while the sum is 23.

The square root of 27135221 is about 5209.1478189815. The cubic root of 27135221 is about 300.4999847730.

Adding to 27135221 its reverse (12253172), we get a palindrome (39388393).

The spelling of 27135221 in words is "twenty-seven million, one hundred thirty-five thousand, two hundred twenty-one".