155240171 has 2 divisors, whose sum is σ = 155240172. Its totient is φ = 155240170.

The previous prime is 155240159. The next prime is 155240177. The reversal of 155240171 is 171042551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155240171 is a prime.

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 155240171.

It is not a weakly prime, because it can be changed into another prime (155240177) 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, 77620085 + 77620086.

It is an arithmetic number, because the mean of its divisors is an integer number (77620086).

Almost surely, 2^155240171 is an apocalyptic number.

155240171 is a deficient number, since it is larger than the sum of its proper divisors (1).

155240171 is an equidigital number, since it uses as much as digits as its factorization.

155240171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 155240171 is about 12459.5413639508. The cubic root of 155240171 is about 537.4458381336.

The spelling of 155240171 in words is "one hundred fifty-five million, two hundred forty thousand, one hundred seventy-one".