27305231 has 2 divisors, whose sum is σ = 27305232. Its totient is φ = 27305230.

The previous prime is 27305189. The next prime is 27305237. The reversal of 27305231 is 13250372.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27305231 is a prime.

It is a super-2 number, since 2×27305231² = 1491151279926722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27305197 and 27305206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27305237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13652615 + 13652616.

It is an arithmetic number, because the mean of its divisors is an integer number (13652616).

Almost surely, 2^27305231 is an apocalyptic number.

27305231 is a deficient number, since it is larger than the sum of its proper divisors (1).

27305231 is an equidigital number, since it uses as much as digits as its factorization.

27305231 is an odious number, because the sum of its binary digits is odd.

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

The square root of 27305231 is about 5225.4407469610. The cubic root of 27305231 is about 301.1262517508.

The spelling of 27305231 in words is "twenty-seven million, three hundred five thousand, two hundred thirty-one".