27530231 has 4 divisors (see below), whose sum is σ = 27541200. Its totient is φ = 27519264.

The previous prime is 27530227. The next prime is 27530273. The reversal of 27530231 is 13203572.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 27530231 - 2² = 27530227 is a prime.

It is a super-2 number, since 2×27530231² = 1515827237826722, 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 = 27530197 and 27530206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27536231) 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, 350 + ... + 7428.

It is an arithmetic number, because the mean of its divisors is an integer number (6885300).

Almost surely, 2^27530231 is an apocalyptic number.

27530231 is a deficient number, since it is larger than the sum of its proper divisors (10969).

27530231 is an equidigital number, since it uses as much as digits as its factorization.

27530231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10968.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 27530231 is about 5246.9258618738. The cubic root of 27530231 is about 301.9511016835.

The spelling of 27530231 in words is "twenty-seven million, five hundred thirty thousand, two hundred thirty-one".