3215696985 has 12 divisors (see below), whose sum is σ = 5573874852. Its totient is φ = 1715038368.

The previous prime is 3215696983. The next prime is 3215697011. The reversal of 3215696985 is 5896965123.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2547422784 + 668274201 = 50472^2 + 25851^2 .

It is not a de Polignac number, because 3215696985 - 2¹ = 3215696983 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3215696983) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 35729922 + ... + 35730011.

It is an arithmetic number, because the mean of its divisors is an integer number (464489571).

Almost surely, 2^3215696985 is an apocalyptic number.

It is an amenable number.

3215696985 is a deficient number, since it is larger than the sum of its proper divisors (2358177867).

3215696985 is a wasteful number, since it uses less digits than its factorization.

3215696985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71459944 (or 71459941 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 54.

The square root of 3215696985 is about 56707.1158233250. The cubic root of 3215696985 is about 1476.0181781642.

The spelling of 3215696985 in words is "three billion, two hundred fifteen million, six hundred ninety-six thousand, nine hundred eighty-five".