27423221 has 8 divisors (see below), whose sum is σ = 31855104. Its totient is φ = 23119920.

The previous prime is 27423211. The next prime is 27423223. The reversal of 27423221 is 12232472.

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 a de Polignac number, because none of the positive numbers 2^k-27423221 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 (27423223) 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, 31685 + ... + 32538.

It is an arithmetic number, because the mean of its divisors is an integer number (3981888).

Almost surely, 2^27423221 is an apocalyptic number.

It is an amenable number.

27423221 is a deficient number, since it is larger than the sum of its proper divisors (4431883).

27423221 is an equidigital number, since it uses as much as digits as its factorization.

27423221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64291.

The product of its digits is 1344, while the sum is 23.

The square root of 27423221 is about 5236.7185335857. The cubic root of 27423221 is about 301.5593657365.

Adding to 27423221 its reverse (12232472), we get a palindrome (39655693).

The spelling of 27423221 in words is "twenty-seven million, four hundred twenty-three thousand, two hundred twenty-one".