72516543 has 16 divisors (see below), whose sum is σ = 111684096. Its totient is φ = 41363840.

The previous prime is 72516481. The next prime is 72516547. The reversal of 72516543 is 34561527.

It is a cyclic number.

It is not a de Polignac number, because 72516543 - 2⁸ = 72516287 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72516547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64071 + ... + 65192.

It is an arithmetic number, because the mean of its divisors is an integer number (6980256).

Almost surely, 2^72516543 is an apocalyptic number.

72516543 is a deficient number, since it is larger than the sum of its proper divisors (39167553).

72516543 is a wasteful number, since it uses less digits than its factorization.

72516543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129294.

The product of its digits is 25200, while the sum is 33.

The square root of 72516543 is about 8515.6645659631. The cubic root of 72516543 is about 417.0092585745.

It can be divided in two parts, 72 and 516543, that added together give a palindrome (516615).

The spelling of 72516543 in words is "seventy-two million, five hundred sixteen thousand, five hundred forty-three".