27240217 has 2 divisors, whose sum is σ = 27240218. Its totient is φ = 27240216.

The previous prime is 27240203. The next prime is 27240223. The reversal of 27240217 is 71204272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25441936 + 1798281 = 5044^2 + 1341^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27240217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27240191 and 27240200.

It is not a weakly prime, because it can be changed into another prime (27243217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13620108 + 13620109.

It is an arithmetic number, because the mean of its divisors is an integer number (13620109).

Almost surely, 2^27240217 is an apocalyptic number.

It is an amenable number.

27240217 is a deficient number, since it is larger than the sum of its proper divisors (1).

27240217 is an equidigital number, since it uses as much as digits as its factorization.

27240217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 27240217 is about 5219.2161288837. The cubic root of 27240217 is about 300.8870670475.

Adding to 27240217 its reverse (71204272), we get a palindrome (98444489).

The spelling of 27240217 in words is "twenty-seven million, two hundred forty thousand, two hundred seventeen".