2001219985 has 16 divisors (see below), whose sum is σ = 2477287872. Its totient is φ = 1551211200.

The previous prime is 2001219967. The next prime is 2001220007. The reversal of 2001219985 is 5899121002.

It is a de Polignac number, because none of the positive numbers 2^k-2001219985 is a prime.

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, 28531 + ... + 69400.

It is an arithmetic number, because the mean of its divisors is an integer number (154830492).

Almost surely, 2^2001219985 is an apocalyptic number.

It is an amenable number.

2001219985 is a deficient number, since it is larger than the sum of its proper divisors (476067887).

2001219985 is an equidigital number, since it uses as much as digits as its factorization.

2001219985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98064.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 2001219985 is about 44734.9973175365. The cubic root of 2001219985 is about 1260.1771786201.

The spelling of 2001219985 in words is "two billion, one million, two hundred nineteen thousand, nine hundred eighty-five".