27281231 has 4 divisors (see below), whose sum is σ = 27369264. Its totient is φ = 27193200.

The previous prime is 27281227. The next prime is 27281263. The reversal of 27281231 is 13218272.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27281231 - 2² = 27281227 is a prime.

It is a super-2 number, since 2×27281231² = 1488531129750722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27281231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27281281) 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, 43550 + ... + 44171.

It is an arithmetic number, because the mean of its divisors is an integer number (6842316).

Almost surely, 2^27281231 is an apocalyptic number.

27281231 is a deficient number, since it is larger than the sum of its proper divisors (88033).

27281231 is an equidigital number, since it uses as much as digits as its factorization.

27281231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88032.

The product of its digits is 1344, while the sum is 26.

The square root of 27281231 is about 5223.1437851164. The cubic root of 27281231 is about 301.0380006695.

The spelling of 27281231 in words is "twenty-seven million, two hundred eighty-one thousand, two hundred thirty-one".