27272321 has 4 divisors (see below), whose sum is σ = 27283200. Its totient is φ = 27261444.

The previous prime is 27272303. The next prime is 27272327. The reversal of 27272321 is 12327272.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 27272321 - 2¹⁰ = 27271297 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27272327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440 + ... + 7398.

It is an arithmetic number, because the mean of its divisors is an integer number (6820800).

Almost surely, 2^27272321 is an apocalyptic number.

It is an amenable number.

27272321 is a deficient number, since it is larger than the sum of its proper divisors (10879).

27272321 is an equidigital number, since it uses as much as digits as its factorization.

27272321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10878.

The product of its digits is 2352, while the sum is 26.

The square root of 27272321 is about 5222.2907808738. The cubic root of 27272321 is about 301.0052242814.

Adding to 27272321 its reverse (12327272), we get a palindrome (39599593).

The spelling of 27272321 in words is "twenty-seven million, two hundred seventy-two thousand, three hundred twenty-one".