2142917985 has 16 divisors (see below), whose sum is σ = 3692412864. Its totient is φ = 1054974912.

The previous prime is 2142917947. The next prime is 2142917999. The reversal of 2142917985 is 5897192412.

It is a happy number.

It is not a de Polignac number, because 2142917985 - 2⁸ = 2142917729 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5494467 + ... + 5494856.

It is an arithmetic number, because the mean of its divisors is an integer number (230775804).

Almost surely, 2^2142917985 is an apocalyptic number.

It is an amenable number.

2142917985 is a deficient number, since it is larger than the sum of its proper divisors (1549494879).

2142917985 is a wasteful number, since it uses less digits than its factorization.

2142917985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10989344.

The product of its digits is 362880, while the sum is 48.

The square root of 2142917985 is about 46291.6621542152. The cubic root of 2142917985 is about 1289.2441909951.

The spelling of 2142917985 in words is "two billion, one hundred forty-two million, nine hundred seventeen thousand, nine hundred eighty-five".