27227021 has 4 divisors (see below), whose sum is σ = 28105344. Its totient is φ = 26348700.

The previous prime is 27227017. The next prime is 27227023. The reversal of 27227021 is 12072272.

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.

It is a cyclic number.

It is not a de Polignac number, because 27227021 - 2² = 27227017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27227023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439115 + ... + 439176.

It is an arithmetic number, because the mean of its divisors is an integer number (7026336).

Almost surely, 2^27227021 is an apocalyptic number.

It is an amenable number.

27227021 is a deficient number, since it is larger than the sum of its proper divisors (878323).

27227021 is an equidigital number, since it uses as much as digits as its factorization.

27227021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878322.

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

The square root of 27227021 is about 5217.9518012339. The cubic root of 27227021 is about 300.8384728794.

Adding to 27227021 its reverse (12072272), we get a palindrome (39299293).

The spelling of 27227021 in words is "twenty-seven million, two hundred twenty-seven thousand, twenty-one".