155128163 has 4 divisors (see below), whose sum is σ = 160477440. Its totient is φ = 149778888.

The previous prime is 155128159. The next prime is 155128187. The reversal of 155128163 is 361821551.

155128163 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155128163 - 2² = 155128159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155128763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2674595 + ... + 2674652.

It is an arithmetic number, because the mean of its divisors is an integer number (40119360).

Almost surely, 2^155128163 is an apocalyptic number.

155128163 is a deficient number, since it is larger than the sum of its proper divisors (5349277).

155128163 is an equidigital number, since it uses as much as digits as its factorization.

155128163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5349276.

The product of its digits is 7200, while the sum is 32.

The square root of 155128163 is about 12455.0456843803. The cubic root of 155128163 is about 537.3165487519.

The spelling of 155128163 in words is "one hundred fifty-five million, one hundred twenty-eight thousand, one hundred sixty-three".