172180206 has 24 divisors (see below), whose sum is σ = 406971864. Its totient is φ = 52175760.

The previous prime is 172180193. The next prime is 172180207. The reversal of 172180206 is 602081271.

It is a self number, because there is not a number n which added to its sum of digits gives 172180206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172180207) 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 in 11 ways as a sum of consecutive naturals, for example, 434601 + ... + 434996.

It is an arithmetic number, because the mean of its divisors is an integer number (16957161).

Almost surely, 2^172180206 is an apocalyptic number.

172180206 is an abundant number, since it is smaller than the sum of its proper divisors (234791658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172180206 is a wasteful number, since it uses less digits than its factorization.

172180206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869616 (or 869613 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 172180206 is about 13121.7455393709. The cubic root of 172180206 is about 556.3239296427.

The spelling of 172180206 in words is "one hundred seventy-two million, one hundred eighty thousand, two hundred six".