172219305 has 16 divisors (see below), whose sum is σ = 275713920. Its totient is φ = 91795968.

The previous prime is 172219303. The next prime is 172219309. The reversal of 172219305 is 503912271.

It is not a de Polignac number, because 172219305 - 2¹ = 172219303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172219303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45724 + ... + 49346.

It is an arithmetic number, because the mean of its divisors is an integer number (17232120).

Almost surely, 2^172219305 is an apocalyptic number.

172219305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172219305 is a deficient number, since it is larger than the sum of its proper divisors (103494615).

172219305 is a wasteful number, since it uses less digits than its factorization.

172219305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6800.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 172219305 is about 13123.2353099379. The cubic root of 172219305 is about 556.3660368116.

The spelling of 172219305 in words is "one hundred seventy-two million, two hundred nineteen thousand, three hundred five".