181070161 has 2 divisors, whose sum is σ = 181070162. Its totient is φ = 181070160.

The previous prime is 181070159. The next prime is 181070167. The reversal of 181070161 is 161070181.

181070161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139712400 + 41357761 = 11820^2 + 6431^2 .

It is a cyclic number.

It is not a de Polignac number, because 181070161 - 2¹ = 181070159 is a prime.

Together with 181070159, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (181070167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90535080 + 90535081.

It is an arithmetic number, because the mean of its divisors is an integer number (90535081).

Almost surely, 2^181070161 is an apocalyptic number.

It is an amenable number.

181070161 is a deficient number, since it is larger than the sum of its proper divisors (1).

181070161 is an equidigital number, since it uses as much as digits as its factorization.

181070161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 25.

The square root of 181070161 is about 13456.2313074650. The cubic root of 181070161 is about 565.7383627203.

The spelling of 181070161 in words is "one hundred eighty-one million, seventy thousand, one hundred sixty-one".