27493221 has 16 divisors (see below), whose sum is σ = 42057728. Its totient is φ = 15649200.

The previous prime is 27493217. The next prime is 27493223. The reversal of 27493221 is 12239472.

It is not a de Polignac number, because 27493221 - 2² = 27493217 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 (27493223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3276 + ... + 8106.

It is an arithmetic number, because the mean of its divisors is an integer number (2628608).

Almost surely, 2^27493221 is an apocalyptic number.

27493221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

27493221 is a deficient number, since it is larger than the sum of its proper divisors (14564507).

27493221 is a wasteful number, since it uses less digits than its factorization.

27493221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5112.

The product of its digits is 6048, while the sum is 30.

The square root of 27493221 is about 5243.3978487237. The cubic root of 27493221 is about 301.8157326562.

The spelling of 27493221 in words is "twenty-seven million, four hundred ninety-three thousand, two hundred twenty-one".