172250309 has 16 divisors (see below), whose sum is σ = 215232000. Its totient is φ = 133922160.

The previous prime is 172250297. The next prime is 172250311. The reversal of 172250309 is 903052271.

It is a cyclic number.

It is not a de Polignac number, because 172250309 - 2¹⁶ = 172184773 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172250399) 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 15 ways as a sum of consecutive naturals, for example, 36182 + ... + 40664.

It is an arithmetic number, because the mean of its divisors is an integer number (13452000).

Almost surely, 2^172250309 is an apocalyptic number.

It is an amenable number.

172250309 is a deficient number, since it is larger than the sum of its proper divisors (42981691).

172250309 is a wasteful number, since it uses less digits than its factorization.

172250309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5000.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 172250309 is about 13124.4165203639. The cubic root of 172250309 is about 556.3994216434.

The spelling of 172250309 in words is "one hundred seventy-two million, two hundred fifty thousand, three hundred nine".