72516155 has 8 divisors (see below), whose sum is σ = 87655392. Its totient is φ = 57588928.

The previous prime is 72516149. The next prime is 72516173. The reversal of 72516155 is 55161527.

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

It is a cyclic number.

It is not a de Polignac number, because 72516155 - 2⁸ = 72515899 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52247 + ... + 53616.

It is an arithmetic number, because the mean of its divisors is an integer number (10956924).

Almost surely, 2^72516155 is an apocalyptic number.

72516155 is a deficient number, since it is larger than the sum of its proper divisors (15139237).

72516155 is a wasteful number, since it uses less digits than its factorization.

72516155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106005.

The product of its digits is 10500, while the sum is 32.

The square root of 72516155 is about 8515.6417843871. The cubic root of 72516155 is about 417.0085148367.

The spelling of 72516155 in words is "seventy-two million, five hundred sixteen thousand, one hundred fifty-five".