27211231 has 6 divisors (see below), whose sum is σ = 28446320. Its totient is φ = 26027628.

The previous prime is 27211199. The next prime is 27211241. The reversal of 27211231 is 13211272.

It is not a de Polignac number, because 27211231 - 2⁵ = 27211199 is a prime.

It is a super-2 number, since 2×27211231² = 1480902185070722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27211199 and 27211208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27211241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25191 + ... + 26248.

Almost surely, 2^27211231 is an apocalyptic number.

27211231 is a deficient number, since it is larger than the sum of its proper divisors (1235089).

27211231 is an equidigital number, since it uses as much as digits as its factorization.

27211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51485 (or 51462 counting only the distinct ones).

The product of its digits is 168, while the sum is 19.

The square root of 27211231 is about 5216.4385360129. The cubic root of 27211231 is about 300.7803056875.

The spelling of 27211231 in words is "twenty-seven million, two hundred eleven thousand, two hundred thirty-one".