72100171 has 8 divisors (see below), whose sum is σ = 84705264. Its totient is φ = 60503520.

The previous prime is 72100153. The next prime is 72100187. The reversal of 72100171 is 17100127.

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

It is not a de Polignac number, because 72100171 - 2⁹ = 72099659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72100871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251956 + ... + 252241.

It is an arithmetic number, because the mean of its divisors is an integer number (10588158).

Almost surely, 2^72100171 is an apocalyptic number.

72100171 is a deficient number, since it is larger than the sum of its proper divisors (12605093).

72100171 is a wasteful number, since it uses less digits than its factorization.

72100171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504221.

The product of its (nonzero) digits is 98, while the sum is 19.

The square root of 72100171 is about 8491.1819554170. The cubic root of 72100171 is about 416.2096049080.

Adding to 72100171 its reverse (17100127), we get a palindrome (89200298).

The spelling of 72100171 in words is "seventy-two million, one hundred thousand, one hundred seventy-one".