172221267 has 4 divisors (see below), whose sum is σ = 229628360. Its totient is φ = 114814176.

The previous prime is 172221241. The next prime is 172221281. The reversal of 172221267 is 762122271.

172221267 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 762122271 = 3 ⋅254040757.

It is not a de Polignac number, because 172221267 - 2¹¹ = 172219219 is a prime.

It is a super-3 number, since 3×172221267³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172223267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28703542 + ... + 28703547.

It is an arithmetic number, because the mean of its divisors is an integer number (57407090).

Almost surely, 2^172221267 is an apocalyptic number.

172221267 is a deficient number, since it is larger than the sum of its proper divisors (57407093).

172221267 is an equidigital number, since it uses as much as digits as its factorization.

172221267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57407092.

The product of its digits is 4704, while the sum is 30.

The square root of 172221267 is about 13123.3100626328. The cubic root of 172221267 is about 556.3681495946.

The spelling of 172221267 in words is "one hundred seventy-two million, two hundred twenty-one thousand, two hundred sixty-seven".