27221105 has 4 divisors (see below), whose sum is σ = 32665332. Its totient is φ = 21776880.

The previous prime is 27221087. The next prime is 27221113. The reversal of 27221105 is 50112272.

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 3083536 + 24137569 = 1756^2 + 4913^2 .

It is not a de Polignac number, because 27221105 - 2⁶ = 27221041 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2722106 + ... + 2722115.

It is an arithmetic number, because the mean of its divisors is an integer number (8166333).

Almost surely, 2^27221105 is an apocalyptic number.

It is an amenable number.

27221105 is a deficient number, since it is larger than the sum of its proper divisors (5444227).

27221105 is an equidigital number, since it uses as much as digits as its factorization.

27221105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5444226.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 27221105 is about 5217.3848813366. The cubic root of 27221105 is about 300.8166821575.

Adding to 27221105 its reverse (50112272), we get a palindrome (77333377).

The spelling of 27221105 in words is "twenty-seven million, two hundred twenty-one thousand, one hundred five".