27431161 has 2 divisors, whose sum is σ = 27431162. Its totient is φ = 27431160.

The previous prime is 27431147. The next prime is 27431177. The reversal of 27431161 is 16113472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16000000 + 11431161 = 4000^2 + 3381^2 .

It is a cyclic number.

It is not a de Polignac number, because 27431161 - 2¹¹ = 27429113 is a prime.

It is not a weakly prime, because it can be changed into another prime (27431101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13715580 + 13715581.

It is an arithmetic number, because the mean of its divisors is an integer number (13715581).

Almost surely, 2^27431161 is an apocalyptic number.

It is an amenable number.

27431161 is a deficient number, since it is larger than the sum of its proper divisors (1).

27431161 is an equidigital number, since it uses as much as digits as its factorization.

27431161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 27431161 is about 5237.4765870598. The cubic root of 27431161 is about 301.5884669900.

The spelling of 27431161 in words is "twenty-seven million, four hundred thirty-one thousand, one hundred sixty-one".