2217987385 has 8 divisors (see below), whose sum is σ = 2733519816. Its totient is φ = 1726433280.

The previous prime is 2217987379. The next prime is 2217987403. The reversal of 2217987385 is 5837897122.

It can be written as a sum of positive squares in 4 ways, for example, as 769119289 + 1448868096 = 27733^2 + 38064^2 .

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

It is not a de Polignac number, because 2217987385 - 2³ = 2217987377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5994376 + ... + 5994745.

It is an arithmetic number, because the mean of its divisors is an integer number (341689977).

Almost surely, 2^2217987385 is an apocalyptic number.

It is an amenable number.

2217987385 is a deficient number, since it is larger than the sum of its proper divisors (515532431).

2217987385 is a wasteful number, since it uses less digits than its factorization.

2217987385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11989163.

The product of its digits is 1693440, while the sum is 52.

The square root of 2217987385 is about 47095.5134275018. The cubic root of 2217987385 is about 1304.1264119063.

The spelling of 2217987385 in words is "two billion, two hundred seventeen million, nine hundred eighty-seven thousand, three hundred eighty-five".