72447571 has 8 divisors (see below), whose sum is σ = 83170304. Its totient is φ = 61818120.

The previous prime is 72447559. The next prime is 72447601. The reversal of 72447571 is 17574427.

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

It is not a de Polignac number, because 72447571 - 2¹¹ = 72445523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72447571.

It is not an unprimeable number, because it can be changed into a prime (72447511) 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 7 ways as a sum of consecutive naturals, for example, 21645 + ... + 24766.

It is an arithmetic number, because the mean of its divisors is an integer number (10396288).

Almost surely, 2^72447571 is an apocalyptic number.

72447571 is a deficient number, since it is larger than the sum of its proper divisors (10722733).

72447571 is a wasteful number, since it uses less digits than its factorization.

72447571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46641.

The product of its digits is 54880, while the sum is 37.

The square root of 72447571 is about 8511.6138892692. The cubic root of 72447571 is about 416.8770078957.

It can be divided in two parts, 7 and 2447571, that added together give a triangular number (2447578 = T₂₂₁₂).

The spelling of 72447571 in words is "seventy-two million, four hundred forty-seven thousand, five hundred seventy-one".