72160171 has 4 divisors (see below), whose sum is σ = 72711144. Its totient is φ = 71609200.

The previous prime is 72160169. The next prime is 72160201. The reversal of 72160171 is 17106127.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72160171 - 2¹ = 72160169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72160141) 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 3 ways as a sum of consecutive naturals, for example, 275290 + ... + 275551.

It is an arithmetic number, because the mean of its divisors is an integer number (18177786).

Almost surely, 2^72160171 is an apocalyptic number.

72160171 is a deficient number, since it is larger than the sum of its proper divisors (550973).

72160171 is a wasteful number, since it uses less digits than its factorization.

72160171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550972.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 72160171 is about 8494.7142977266. The cubic root of 72160171 is about 416.3250260504.

Adding to 72160171 its reverse (17106127), we get a palindrome (89266298).

The spelling of 72160171 in words is "seventy-two million, one hundred sixty thousand, one hundred seventy-one".