155161 has 2 divisors, whose sum is σ = 155162. Its totient is φ = 155160.

The previous prime is 155153. The next prime is 155167. The reversal of 155161 is 161551.

155161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145161 + 10000 = 381^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 155161 - 2³ = 155153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77580 + 77581.

It is an arithmetic number, because the mean of its divisors is an integer number (77581).

2¹⁵⁵¹⁶¹ is an apocalyptic number.

It is an amenable number.

155161 is a deficient number, since it is larger than the sum of its proper divisors (1).

155161 is an equidigital number, since it uses as much as digits as its factorization.

155161 is an odious number, because the sum of its binary digits is odd.

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

The square root of 155161 is about 393.9048108363. The cubic root of 155161 is about 53.7354458521.

The spelling of 155161 in words is "one hundred fifty-five thousand, one hundred sixty-one".