115613161 has 2 divisors, whose sum is σ = 115613162. Its totient is φ = 115613160.

The previous prime is 115613159. The next prime is 115613189. The reversal of 115613161 is 161316511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101505625 + 14107536 = 10075^2 + 3756^2 .

It is an emirp because it is prime and its reverse (161316511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115613161 - 2¹ = 115613159 is a prime.

Together with 115613159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (115613101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57806580 + 57806581.

It is an arithmetic number, because the mean of its divisors is an integer number (57806581).

Almost surely, 2^115613161 is an apocalyptic number.

It is an amenable number.

115613161 is a deficient number, since it is larger than the sum of its proper divisors (1).

115613161 is an equidigital number, since it uses as much as digits as its factorization.

115613161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 25.

The square root of 115613161 is about 10752.3560673929. The cubic root of 115613161 is about 487.1571620652.

Adding to 115613161 its reverse (161316511), we get a palindrome (276929672).

The spelling of 115613161 in words is "one hundred fifteen million, six hundred thirteen thousand, one hundred sixty-one".