2143089845 has 12 divisors (see below), whose sum is σ = 2784749796. Its totient is φ = 1582588800.

The previous prime is 2143089841. The next prime is 2143089869. The reversal of 2143089845 is 5489803412.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 801625969 + 1341463876 = 28313^2 + 36626^2 .

It is not a de Polignac number, because 2143089845 - 2² = 2143089841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2143089796 and 2143089805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143089841) 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, 1267256 + ... + 1268945.

It is an arithmetic number, because the mean of its divisors is an integer number (232062483).

Almost surely, 2^2143089845 is an apocalyptic number.

It is an amenable number.

2143089845 is a deficient number, since it is larger than the sum of its proper divisors (641659951).

2143089845 is a wasteful number, since it uses less digits than its factorization.

2143089845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536232 (or 2536219 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 2143089845 is about 46293.5183908072. The cubic root of 2143089845 is about 1289.2786554629.

The spelling of 2143089845 in words is "two billion, one hundred forty-three million, eighty-nine thousand, eight hundred forty-five".