27563161 has 2 divisors, whose sum is σ = 27563162. Its totient is φ = 27563160.

The previous prime is 27563119. The next prime is 27563209. The reversal of 27563161 is 16136572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15452761 + 12110400 = 3931^2 + 3480^2 .

It is a cyclic number.

It is not a de Polignac number, because 27563161 - 2⁹ = 27562649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27561161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13781580 + 13781581.

It is an arithmetic number, because the mean of its divisors is an integer number (13781581).

Almost surely, 2^27563161 is an apocalyptic number.

It is an amenable number.

27563161 is a deficient number, since it is larger than the sum of its proper divisors (1).

27563161 is an equidigital number, since it uses as much as digits as its factorization.

27563161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 31.

The square root of 27563161 is about 5250.0629520035. The cubic root of 27563161 is about 302.0714456054.

It can be divided in two parts, 275 and 63161, that added together give a palindrome (63436).

The spelling of 27563161 in words is "twenty-seven million, five hundred sixty-three thousand, one hundred sixty-one".