155259161 has 2 divisors, whose sum is σ = 155259162. Its totient is φ = 155259160.

The previous prime is 155259121. The next prime is 155259173. The reversal of 155259161 is 161952551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123899161 + 31360000 = 11131^2 + 5600^2 .

It is a cyclic number.

It is not a de Polignac number, because 155259161 - 2²⁶ = 88150297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155259121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77629580 + 77629581.

It is an arithmetic number, because the mean of its divisors is an integer number (77629581).

Almost surely, 2^155259161 is an apocalyptic number.

It is an amenable number.

155259161 is a deficient number, since it is larger than the sum of its proper divisors (1).

155259161 is an equidigital number, since it uses as much as digits as its factorization.

155259161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13500, while the sum is 35.

The square root of 155259161 is about 12460.3034072209. The cubic root of 155259161 is about 537.4677518781.

The spelling of 155259161 in words is "one hundred fifty-five million, two hundred fifty-nine thousand, one hundred sixty-one".