172030211 has 4 divisors (see below), whose sum is σ = 172491792. Its totient is φ = 171568632.

The previous prime is 172030181. The next prime is 172030249. The reversal of 172030211 is 112030271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112030271 = 1811 ⋅61861.

It is a cyclic number.

It is not a de Polignac number, because 172030211 - 2¹⁴ = 172013827 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172030211.

It is not an unprimeable number, because it can be changed into a prime (172035211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230231 + ... + 230976.

It is an arithmetic number, because the mean of its divisors is an integer number (43122948).

Almost surely, 2^172030211 is an apocalyptic number.

172030211 is a deficient number, since it is larger than the sum of its proper divisors (461581).

172030211 is an equidigital number, since it uses as much as digits as its factorization.

172030211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461580.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 172030211 is about 13116.0287816092. The cubic root of 172030211 is about 556.1623352821.

Adding to 172030211 its reverse (112030271), we get a palindrome (284060482).

The spelling of 172030211 in words is "one hundred seventy-two million, thirty thousand, two hundred eleven".