72316815 has 16 divisors (see below), whose sum is σ = 116832768. Its totient is φ = 38193696.

The previous prime is 72316801. The next prime is 72316819. The reversal of 72316815 is 51861327.

It is not a de Polignac number, because 72316815 - 2⁷ = 72316687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72316819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21859 + ... + 24948.

It is an arithmetic number, because the mean of its divisors is an integer number (7302048).

Almost surely, 2^72316815 is an apocalyptic number.

72316815 is a deficient number, since it is larger than the sum of its proper divisors (44515953).

72316815 is a wasteful number, since it uses less digits than its factorization.

72316815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46918.

The product of its digits is 10080, while the sum is 33.

The square root of 72316815 is about 8503.9293858780. The cubic root of 72316815 is about 416.6260586203.

The spelling of 72316815 in words is "seventy-two million, three hundred sixteen thousand, eight hundred fifteen".