27550213 has 2 divisors, whose sum is σ = 27550214. Its totient is φ = 27550212.

The previous prime is 27550207. The next prime is 27550241. The reversal of 27550213 is 31205572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27436644 + 113569 = 5238^2 + 337^2 .

It is a cyclic number.

It is not a de Polignac number, because 27550213 - 2⁵ = 27550181 is a prime.

It is equal to p_1715173 and since 27550213 and 1715173 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 (27550283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13775106 + 13775107.

It is an arithmetic number, because the mean of its divisors is an integer number (13775107).

Almost surely, 2^27550213 is an apocalyptic number.

It is an amenable number.

27550213 is a deficient number, since it is larger than the sum of its proper divisors (1).

27550213 is an equidigital number, since it uses as much as digits as its factorization.

27550213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 27550213 is about 5248.8296790809. The cubic root of 27550213 is about 302.0241380938.

Adding to 27550213 its reverse (31205572), we get a palindrome (58755785).

The spelling of 27550213 in words is "twenty-seven million, five hundred fifty thousand, two hundred thirteen".