2143419985 has 12 divisors (see below), whose sum is σ = 2992039668. Its totient is φ = 1469773536.

The previous prime is 2143419977. The next prime is 2143419989. The reversal of 2143419985 is 5899143412.

It can be written as a sum of positive squares in 2 ways, for example, as 1051315776 + 1092104209 = 32424^2 + 33047^2 .

It is not a de Polignac number, because 2143419985 - 2³ = 2143419977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143419989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4374082 + ... + 4374571.

It is an arithmetic number, because the mean of its divisors is an integer number (249336639).

Almost surely, 2^2143419985 is an apocalyptic number.

It is an amenable number.

2143419985 is a deficient number, since it is larger than the sum of its proper divisors (848619683).

2143419985 is an equidigital number, since it uses as much as digits as its factorization.

2143419985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8748672 (or 8748665 counting only the distinct ones).

The product of its digits is 311040, while the sum is 46.

The square root of 2143419985 is about 46297.0839794473. The cubic root of 2143419985 is about 1289.3448559229.

The spelling of 2143419985 in words is "two billion, one hundred forty-three million, four hundred nineteen thousand, nine hundred eighty-five".