27311213 has 2 divisors, whose sum is σ = 27311214. Its totient is φ = 27311212.

The previous prime is 27311203. The next prime is 27311239. The reversal of 27311213 is 31211372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16467364 + 10843849 = 4058^2 + 3293^2 .

It is a cyclic number.

It is not a de Polignac number, because 27311213 - 2⁸ = 27310957 is a prime.

It is equal to p_1701218 and since 27311213 and 1701218 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27311203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13655606 + 13655607.

It is an arithmetic number, because the mean of its divisors is an integer number (13655607).

Almost surely, 2^27311213 is an apocalyptic number.

It is an amenable number.

27311213 is a deficient number, since it is larger than the sum of its proper divisors (1).

27311213 is an equidigital number, since it uses as much as digits as its factorization.

27311213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 20.

The square root of 27311213 is about 5226.0131075228. The cubic root of 27311213 is about 301.1482402812.

Adding to 27311213 its reverse (31211372), we get a palindrome (58522585).

The spelling of 27311213 in words is "twenty-seven million, three hundred eleven thousand, two hundred thirteen".