72317161 has 8 divisors (see below), whose sum is σ = 84407040. Its totient is φ = 60667008.

The previous prime is 72317159. The next prime is 72317171. The reversal of 72317161 is 16171327.

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

It is a cyclic number.

It is not a de Polignac number, because 72317161 - 2¹ = 72317159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72317101) 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, 109576 + ... + 110233.

It is an arithmetic number, because the mean of its divisors is an integer number (10550880).

Almost surely, 2^72317161 is an apocalyptic number.

It is an amenable number.

72317161 is a deficient number, since it is larger than the sum of its proper divisors (12089879).

72317161 is a wasteful number, since it uses less digits than its factorization.

72317161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219863.

The product of its digits is 1764, while the sum is 28.

The square root of 72317161 is about 8503.9497293905. The cubic root of 72317161 is about 416.6267230687.

Adding to 72317161 its reverse (16171327), we get a palindrome (88488488).

The spelling of 72317161 in words is "seventy-two million, three hundred seventeen thousand, one hundred sixty-one".