3217309985 has 16 divisors (see below), whose sum is σ = 3896760000. Its totient is φ = 2549935296.

The previous prime is 3217309973. The next prime is 3217309999. The reversal of 3217309985 is 5899037123.

It is a cyclic number.

It is not a de Polignac number, because 3217309985 - 2⁴ = 3217309969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342167 + ... + 351443.

It is an arithmetic number, because the mean of its divisors is an integer number (243547500).

Almost surely, 2^3217309985 is an apocalyptic number.

It is an amenable number.

3217309985 is a deficient number, since it is larger than the sum of its proper divisors (679450015).

3217309985 is a wasteful number, since it uses less digits than its factorization.

3217309985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9920.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 3217309985 is about 56721.3362413122. The cubic root of 3217309985 is about 1476.2649281295.

The spelling of 3217309985 in words is "three billion, two hundred seventeen million, three hundred nine thousand, nine hundred eighty-five".