27311161 has 2 divisors, whose sum is σ = 27311162. Its totient is φ = 27311160.

The previous prime is 27311153. The next prime is 27311173. The reversal of 27311161 is 16111372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20839225 + 6471936 = 4565^2 + 2544^2 .

It is a cyclic number.

It is not a de Polignac number, because 27311161 - 2³ = 27311153 is a prime.

It is not a weakly prime, because it can be changed into another prime (27311101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13655580 + 13655581.

It is an arithmetic number, because the mean of its divisors is an integer number (13655581).

Almost surely, 2^27311161 is an apocalyptic number.

It is an amenable number.

27311161 is a deficient number, since it is larger than the sum of its proper divisors (1).

27311161 is an equidigital number, since it uses as much as digits as its factorization.

27311161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252, while the sum is 22.

The square root of 27311161 is about 5226.0081324085. The cubic root of 27311161 is about 301.1480491544.

It can be divided in two parts, 27311 and 161, that added together give a palindrome (27472).

The spelling of 27311161 in words is "twenty-seven million, three hundred eleven thousand, one hundred sixty-one".