2143431444 has 48 divisors (see below), whose sum is σ = 6235439616. Its totient is φ = 556735200.

The previous prime is 2143431403. The next prime is 2143431457. The reversal of 2143431444 is 4441343412.

It is a nude number because it is divisible by every one of its digits.

It is a congruent 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, 1158942 + ... + 1160789.

It is an arithmetic number, because the mean of its divisors is an integer number (129904992).

Almost surely, 2^2143431444 is an apocalyptic number.

It is an amenable number.

2143431444 is an abundant number, since it is smaller than the sum of its proper divisors (4092008172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2143431444 is a wasteful number, since it uses less digits than its factorization.

2143431444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319756 (or 2319754 counting only the distinct ones).

The product of its digits is 18432, while the sum is 30.

The square root of 2143431444 is about 46297.2077343764. The cubic root of 2143431444 is about 1289.3471535868.

Adding to 2143431444 its reverse (4441343412), we get a palindrome (6584774856).

The spelling of 2143431444 in words is "two billion, one hundred forty-three million, four hundred thirty-one thousand, four hundred forty-four".