72144171 has 12 divisors (see below), whose sum is σ = 113681880. Its totient is φ = 43723680.

The previous prime is 72144131. The next prime is 72144173. The reversal of 72144171 is 17144127.

It is not a de Polignac number, because 72144171 - 2¹¹ = 72142123 is a prime.

It is a super-3 number, since 3×72144171³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (72144173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 364266 + ... + 364463.

It is an arithmetic number, because the mean of its divisors is an integer number (9473490).

Almost surely, 2^72144171 is an apocalyptic number.

72144171 is a deficient number, since it is larger than the sum of its proper divisors (41537709).

72144171 is a wasteful number, since it uses less digits than its factorization.

72144171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728746 (or 728743 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 72144171 is about 8493.7724834140. The cubic root of 72144171 is about 416.2942533369.

Adding to 72144171 its reverse (17144127), we get a palindrome (89288298).

The spelling of 72144171 in words is "seventy-two million, one hundred forty-four thousand, one hundred seventy-one".