72515723 has 8 divisors (see below), whose sum is σ = 87237120. Its totient is φ = 58884840.

The previous prime is 72515699. The next prime is 72515741. The reversal of 72515723 is 32751527.

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

It is not a de Polignac number, because 72515723 - 2⁸ = 72515467 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72515723.

It is not an unprimeable number, because it can be changed into a prime (72515743) 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, 272483 + ... + 272748.

It is an arithmetic number, because the mean of its divisors is an integer number (10904640).

Almost surely, 2^72515723 is an apocalyptic number.

72515723 is a deficient number, since it is larger than the sum of its proper divisors (14721397).

72515723 is a wasteful number, since it uses less digits than its factorization.

72515723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545257.

The product of its digits is 14700, while the sum is 32.

The square root of 72515723 is about 8515.6164192617. The cubic root of 72515723 is about 417.0076867544.

The spelling of 72515723 in words is "seventy-two million, five hundred fifteen thousand, seven hundred twenty-three".