2185515970 has 16 divisors (see below), whose sum is σ = 4291558848. Its totient is φ = 794733040.

The previous prime is 2185515967. The next prime is 2185515989. The reversal of 2185515970 is 795155812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9934054 + ... + 9934273.

It is an arithmetic number, because the mean of its divisors is an integer number (268222428).

Almost surely, 2^2185515970 is an apocalyptic number.

2185515970 is a deficient number, since it is larger than the sum of its proper divisors (2106042878).

2185515970 is a wasteful number, since it uses less digits than its factorization.

2185515970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19868345.

The product of its (nonzero) digits is 126000, while the sum is 43.

The square root of 2185515970 is about 46749.5023502925. The cubic root of 2185515970 is about 1297.7309471676.

The spelling of 2185515970 in words is "two billion, one hundred eighty-five million, five hundred fifteen thousand, nine hundred seventy".