2142178985 has 16 divisors (see below), whose sum is σ = 2620138752. Its totient is φ = 1680974400.

The previous prime is 2142178939. The next prime is 2142178999. The reversal of 2142178985 is 5898712412.

It is not a de Polignac number, because 2142178985 - 2⁸ = 2142178729 is a prime.

It is a super-3 number, since 3×2142178985³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

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, 54620 + ... + 85250.

It is an arithmetic number, because the mean of its divisors is an integer number (163758672).

Almost surely, 2^2142178985 is an apocalyptic number.

It is an amenable number.

2142178985 is a deficient number, since it is larger than the sum of its proper divisors (477959767).

2142178985 is a wasteful number, since it uses less digits than its factorization.

2142178985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30904.

The product of its digits is 322560, while the sum is 47.

The square root of 2142178985 is about 46283.6794669568. The cubic root of 2142178985 is about 1289.0959723814.

The spelling of 2142178985 in words is "two billion, one hundred forty-two million, one hundred seventy-eight thousand, nine hundred eighty-five".