72215087217 has 16 divisors (see below), whose sum is σ = 118506810240. Its totient is φ = 38091474432.

The previous prime is 72215087207. The next prime is 72215087221. The reversal of 72215087217 is 71278051227.

It is not a de Polignac number, because 72215087217 - 2¹⁰ = 72215086193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72215087207) 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, 132261792 + ... + 132262337.

It is an arithmetic number, because the mean of its divisors is an integer number (7406675640).

Almost surely, 2^72215087217 is an apocalyptic number.

It is an amenable number.

72215087217 is a deficient number, since it is larger than the sum of its proper divisors (46291723023).

72215087217 is a wasteful number, since it uses less digits than its factorization.

72215087217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264524152.

The product of its (nonzero) digits is 109760, while the sum is 42.

The spelling of 72215087217 in words is "seventy-two billion, two hundred fifteen million, eighty-seven thousand, two hundred seventeen".