72581115 has 16 divisors (see below), whose sum is σ = 118322208. Its totient is φ = 37979136.

The previous prime is 72581063. The next prime is 72581141. The reversal of 72581115 is 51118527.

It is not a de Polignac number, because 72581115 - 2¹² = 72577019 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44854 + ... + 46443.

It is an arithmetic number, because the mean of its divisors is an integer number (7395138).

Almost surely, 2^72581115 is an apocalyptic number.

72581115 is a deficient number, since it is larger than the sum of its proper divisors (45741093).

72581115 is a wasteful number, since it uses less digits than its factorization.

72581115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91358.

The product of its digits is 2800, while the sum is 30.

The square root of 72581115 is about 8519.4550882084. The cubic root of 72581115 is about 417.1329964707.

The spelling of 72581115 in words is "seventy-two million, five hundred eighty-one thousand, one hundred fifteen".