27557213 has 2 divisors, whose sum is σ = 27557214. Its totient is φ = 27557212.

The previous prime is 27557209. The next prime is 27557219. The reversal of 27557213 is 31275572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27426169 + 131044 = 5237^2 + 362^2 .

It is a cyclic number.

It is not a de Polignac number, because 27557213 - 2² = 27557209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 27557213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27557219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13778606 + 13778607.

It is an arithmetic number, because the mean of its divisors is an integer number (13778607).

Almost surely, 2^27557213 is an apocalyptic number.

It is an amenable number.

27557213 is a deficient number, since it is larger than the sum of its proper divisors (1).

27557213 is an equidigital number, since it uses as much as digits as its factorization.

27557213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14700, while the sum is 32.

The square root of 27557213 is about 5249.4964520419. The cubic root of 27557213 is about 302.0497155117.

The spelling of 27557213 in words is "twenty-seven million, five hundred fifty-seven thousand, two hundred thirteen".