27221017 has 2 divisors, whose sum is σ = 27221018. Its totient is φ = 27221016.

The previous prime is 27221003. The next prime is 27221023. The reversal of 27221017 is 71012272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18524416 + 8696601 = 4304^2 + 2949^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27221017 is a prime.

It is not a weakly prime, because it can be changed into another prime (27221027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13610508 + 13610509.

It is an arithmetic number, because the mean of its divisors is an integer number (13610509).

Almost surely, 2^27221017 is an apocalyptic number.

It is an amenable number.

27221017 is a deficient number, since it is larger than the sum of its proper divisors (1).

27221017 is an equidigital number, since it uses as much as digits as its factorization.

27221017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 27221017 is about 5217.3764479861. The cubic root of 27221017 is about 300.8163579985.

Adding to 27221017 its reverse (71012272), we get a palindrome (98233289).

The spelling of 27221017 in words is "twenty-seven million, two hundred twenty-one thousand, seventeen".