172228141 has 4 divisors (see below), whose sum is σ = 181292800. Its totient is φ = 163163484.

The previous prime is 172228093. The next prime is 172228151. The reversal of 172228141 is 141822271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 141822271 = 1063 ⋅133417.

It is a cyclic number.

It is not a de Polignac number, because 172228141 - 2¹⁹ = 171703853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172228151) 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, 4532301 + ... + 4532338.

It is an arithmetic number, because the mean of its divisors is an integer number (45323200).

Almost surely, 2^172228141 is an apocalyptic number.

It is an amenable number.

172228141 is a deficient number, since it is larger than the sum of its proper divisors (9064659).

172228141 is an equidigital number, since it uses as much as digits as its factorization.

172228141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9064658.

The product of its digits is 1792, while the sum is 28.

The square root of 172228141 is about 13123.5719604077. The cubic root of 172228141 is about 556.3755517461.

The spelling of 172228141 in words is "one hundred seventy-two million, two hundred twenty-eight thousand, one hundred forty-one".