171128055 has 64 divisors (see below), whose sum is σ = 324108288. Its totient is φ = 75479040.

The previous prime is 171128053. The next prime is 171128059. The reversal of 171128055 is 550821171.

It is not a de Polignac number, because 171128055 - 2¹ = 171128053 is a prime.

It is a super-2 number, since 2×171128055² = 58569622416166050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171128053) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 546579 + ... + 546891.

It is an arithmetic number, because the mean of its divisors is an integer number (5064192).

Almost surely, 2^171128055 is an apocalyptic number.

171128055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

171128055 is a deficient number, since it is larger than the sum of its proper divisors (152980233).

171128055 is a wasteful number, since it uses less digits than its factorization.

171128055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496.

The product of its (nonzero) digits is 2800, while the sum is 30.

The square root of 171128055 is about 13081.5922196039. The cubic root of 171128055 is about 555.1884272140.

The spelling of 171128055 in words is "one hundred seventy-one million, one hundred twenty-eight thousand, fifty-five".