172217193 has 16 divisors (see below), whose sum is σ = 239405760. Its totient is φ = 110021184.

The previous prime is 172217173. The next prime is 172217219. The reversal of 172217193 is 391712271.

172217193 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-172217193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172217113) 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, 5758 + ... + 19431.

It is an arithmetic number, because the mean of its divisors is an integer number (14962860).

Almost surely, 2^172217193 is an apocalyptic number.

It is an amenable number.

172217193 is a deficient number, since it is larger than the sum of its proper divisors (67188567).

172217193 is a wasteful number, since it uses less digits than its factorization.

172217193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25288.

The product of its digits is 5292, while the sum is 33.

The square root of 172217193 is about 13123.1548417292. The cubic root of 172217193 is about 556.3637624830.

It can be divided in two parts, 1722 and 17193, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 172217193 in words is "one hundred seventy-two million, two hundred seventeen thousand, one hundred ninety-three".