172226169 has 10 divisors (see below), whose sum is σ = 257276250. Its totient is φ = 114817392.

The previous prime is 172226161. The next prime is 172226177. The reversal of 172226169 is 961622271.

172226169 is a `hidden beast` number, since 17 + 2 + 22 + 616 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (172226161) and next prime (172226177).

It can be written as a sum of positive squares in only one way, i.e., 166100544 + 6125625 = 12888^2 + 2475^2 .

It is not a de Polignac number, because 172226169 - 2³ = 172226161 is a prime.

It is a super-2 number, since 2×172226169² = 59323706576833122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172226161) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1063044 + ... + 1063205.

It is an arithmetic number, because the mean of its divisors is an integer number (25727625).

Almost surely, 2^172226169 is an apocalyptic number.

It is an amenable number.

172226169 is a deficient number, since it is larger than the sum of its proper divisors (85050081).

172226169 is an equidigital number, since it uses as much as digits as its factorization.

172226169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126261 (or 2126252 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 172226169 is about 13123.4968282086. The cubic root of 172226169 is about 556.3734282512.

It can be divided in two parts, 17 and 2226169, that multiplied together give a palindrome (37844873).

The spelling of 172226169 in words is "one hundred seventy-two million, two hundred twenty-six thousand, one hundred sixty-nine".