163115081 has 2 divisors, whose sum is σ = 163115082. Its totient is φ = 163115080.

The previous prime is 163115063. The next prime is 163115083. The reversal of 163115081 is 180511361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87703225 + 75411856 = 9365^2 + 8684^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163115081 is a prime.

It is a super-2 number, since 2×163115081² = 53213059299273122, which contains 22 as substring.

Together with 163115083, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163115081.

It is not a weakly prime, because it can be changed into another prime (163115083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81557540 + 81557541.

It is an arithmetic number, because the mean of its divisors is an integer number (81557541).

Almost surely, 2^163115081 is an apocalyptic number.

It is an amenable number.

163115081 is a deficient number, since it is larger than the sum of its proper divisors (1).

163115081 is an equidigital number, since it uses as much as digits as its factorization.

163115081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 163115081 is about 12771.6514593846. The cubic root of 163115081 is about 546.3840823782.

The spelling of 163115081 in words is "one hundred sixty-three million, one hundred fifteen thousand, eighty-one".