72147543 has 16 divisors (see below), whose sum is σ = 105146496. Its totient is φ = 43734240.

The previous prime is 72147511. The next prime is 72147547. The reversal of 72147543 is 34574127.

It is not a de Polignac number, because 72147543 - 2⁵ = 72147511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72147547) 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 15 ways as a sum of consecutive naturals, for example, 11193 + ... + 16418.

It is an arithmetic number, because the mean of its divisors is an integer number (6571656).

Almost surely, 2^72147543 is an apocalyptic number.

72147543 is a deficient number, since it is larger than the sum of its proper divisors (32998953).

72147543 is a wasteful number, since it uses less digits than its factorization.

72147543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27694.

The product of its digits is 23520, while the sum is 33.

The square root of 72147543 is about 8493.9709794654. The cubic root of 72147543 is about 416.3007390646.

The spelling of 72147543 in words is "seventy-two million, one hundred forty-seven thousand, five hundred forty-three".