172081227 has 8 divisors (see below), whose sum is σ = 234777664. Its totient is φ = 112052808.

The previous prime is 172081213. The next prime is 172081237. The reversal of 172081227 is 722180271.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172081227 - 2⁸ = 172080971 is a prime.

It is a super-2 number, since 2×172081227² = 59223897371651058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172081194 and 172081203.

It is not an unprimeable number, because it can be changed into a prime (172081237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666853 + ... + 667110.

It is an arithmetic number, because the mean of its divisors is an integer number (29347208).

Almost surely, 2^172081227 is an apocalyptic number.

172081227 is a deficient number, since it is larger than the sum of its proper divisors (62696437).

172081227 is a wasteful number, since it uses less digits than its factorization.

172081227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334009.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 172081227 is about 13117.9734334233. The cubic root of 172081227 is about 556.2173069705.

The spelling of 172081227 in words is "one hundred seventy-two million, eighty-one thousand, two hundred twenty-seven".