172199055 has 16 divisors (see below), whose sum is σ = 314878464. Its totient is φ = 78719520.

The previous prime is 172199009. The next prime is 172199077. The reversal of 172199055 is 550991271.

It is not a de Polignac number, because 172199055 - 2¹⁵ = 172166287 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 819891 + ... + 820100.

It is an arithmetic number, because the mean of its divisors is an integer number (19679904).

Almost surely, 2^172199055 is an apocalyptic number.

172199055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

172199055 is a deficient number, since it is larger than the sum of its proper divisors (142679409).

172199055 is a wasteful number, since it uses less digits than its factorization.

172199055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640006.

The product of its (nonzero) digits is 28350, while the sum is 39.

The square root of 172199055 is about 13122.4637549509. The cubic root of 172199055 is about 556.3442296283.

The spelling of 172199055 in words is "one hundred seventy-two million, one hundred ninety-nine thousand, fifty-five".