172811055 has 16 divisors (see below), whose sum is σ = 278490240. Its totient is φ = 91501728.

The previous prime is 172811027. The next prime is 172811077. The reversal of 172811055 is 550118271.

It is not a de Polignac number, because 172811055 - 2⁶ = 172810991 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39357 + ... + 43526.

It is an arithmetic number, because the mean of its divisors is an integer number (17405640).

Almost surely, 2^172811055 is an apocalyptic number.

172811055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

172811055 is a deficient number, since it is larger than the sum of its proper divisors (105679185).

172811055 is a wasteful number, since it uses less digits than its factorization.

172811055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83030.

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

The square root of 172811055 is about 13145.7618645706. The cubic root of 172811055 is about 557.0025377350.

It can be divided in two parts, 17281 and 1055, that added together give a triangular number (18336 = T₁₉₁).

The spelling of 172811055 in words is "one hundred seventy-two million, eight hundred eleven thousand, fifty-five".