155000161 has 2 divisors, whose sum is σ = 155000162. Its totient is φ = 155000160.

The previous prime is 155000149. The next prime is 155000177. The reversal of 155000161 is 161000551.

155000161 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., 111703761 + 43296400 = 10569^2 + 6580^2 .

It is a cyclic number.

It is not a de Polignac number, because 155000161 - 2¹⁹ = 154475873 is a prime.

It is not a weakly prime, because it can be changed into another prime (155009161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77500080 + 77500081.

It is an arithmetic number, because the mean of its divisors is an integer number (77500081).

Almost surely, 2^155000161 is an apocalyptic number.

It is an amenable number.

155000161 is a deficient number, since it is larger than the sum of its proper divisors (1).

155000161 is an equidigital number, since it uses as much as digits as its factorization.

155000161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 155000161 is about 12449.9060639027. The cubic root of 155000161 is about 537.1687214818.

The spelling of 155000161 in words is "one hundred fifty-five million, one hundred sixty-one", and thus it is an aban number.