72543171 has 8 divisors (see below), whose sum is σ = 97259344. Its totient is φ = 48094560.

The previous prime is 72543157. The next prime is 72543187. The reversal of 72543171 is 17134527.

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

It is not a de Polignac number, because 72543171 - 2¹¹ = 72541123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72543101) 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, 66256 + ... + 67341.

It is an arithmetic number, because the mean of its divisors is an integer number (12157418).

Almost surely, 2^72543171 is an apocalyptic number.

72543171 is a deficient number, since it is larger than the sum of its proper divisors (24716173).

72543171 is a wasteful number, since it uses less digits than its factorization.

72543171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133781.

The product of its digits is 5880, while the sum is 30.

The square root of 72543171 is about 8517.2278940979. The cubic root of 72543171 is about 417.0602941185.

Adding to 72543171 its reverse (17134527), we get a palindrome (89677698).

The spelling of 72543171 in words is "seventy-two million, five hundred forty-three thousand, one hundred seventy-one".