2185213471986 has 48 divisors (see below), whose sum is σ = 4418856642240. Its totient is φ = 720420272640.

The previous prime is 2185213471937. The next prime is 2185213472009. The reversal of 2185213471986 is 6891743125812.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91499995 + ... + 91523873.

It is an arithmetic number, because the mean of its divisors is an integer number (92059513380).

Almost surely, 2^{2185213471986} is an apocalyptic number.

2185213471986 is an abundant number, since it is smaller than the sum of its proper divisors (2233643170254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2185213471986 is a wasteful number, since it uses less digits than its factorization.

2185213471986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25699 (or 25602 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 57.

The spelling of 2185213471986 in words is "two trillion, one hundred eighty-five billion, two hundred thirteen million, four hundred seventy-one thousand, nine hundred eighty-six".