27218249 has 2 divisors, whose sum is σ = 27218250. Its totient is φ = 27218248.

The previous prime is 27218239. The next prime is 27218267. The reversal of 27218249 is 94281272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23454649 + 3763600 = 4843^2 + 1940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27218249 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27218209) 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, 13609124 + 13609125.

It is an arithmetic number, because the mean of its divisors is an integer number (13609125).

Almost surely, 2^27218249 is an apocalyptic number.

It is an amenable number.

27218249 is a deficient number, since it is larger than the sum of its proper divisors (1).

27218249 is an equidigital number, since it uses as much as digits as its factorization.

27218249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 27218249 is about 5217.1111738202. Note that the first 4 decimals coincide. The cubic root of 27218249 is about 300.8061613687.

The spelling of 27218249 in words is "twenty-seven million, two hundred eighteen thousand, two hundred forty-nine".