27144181 has 2 divisors, whose sum is σ = 27144182. Its totient is φ = 27144180.

The previous prime is 27144157. The next prime is 27144191. The reversal of 27144181 is 18144172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27144100 + 81 = 5210^2 + 9^2 .

It is a cyclic number.

It is not a de Polignac number, because 27144181 - 2¹³ = 27135989 is a prime.

It is a super-2 number, since 2×27144181² = 1473613124321522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27144191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13572090 + 13572091.

It is an arithmetic number, because the mean of its divisors is an integer number (13572091).

Almost surely, 2^27144181 is an apocalyptic number.

It is an amenable number.

27144181 is a deficient number, since it is larger than the sum of its proper divisors (1).

27144181 is an equidigital number, since it uses as much as digits as its factorization.

27144181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1792, while the sum is 28.

The square root of 27144181 is about 5210.0077735067. The cubic root of 27144181 is about 300.5330559805.

Subtracting from 27144181 its reverse (18144172), we obtain a palindrome (9000009).

It can be divided in two parts, 271441 and 81, that multiplied together give a square (21986721 = 4689²).

The spelling of 27144181 in words is "twenty-seven million, one hundred forty-four thousand, one hundred eighty-one".