2143431312 has 80 divisors (see below), whose sum is σ = 6203894592. Its totient is φ = 631964160.

The previous prime is 2143431289. The next prime is 2143431319. The reversal of 2143431312 is 2131343412.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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

It is not an unprimeable number, because it can be changed into a prime (2143431319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35323 + ... + 74394.

Almost surely, 2^2143431312 is an apocalyptic number.

2143431312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2143431312 is an abundant number, since it is smaller than the sum of its proper divisors (4060463280).

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

2143431312 is a wasteful number, since it uses less digits than its factorization.

2143431312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109776 (or 109770 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 2143431312 is about 46297.2063088044. The cubic root of 2143431312 is about 1289.3471271193.

Adding to 2143431312 its reverse (2131343412), we get a palindrome (4274774724).

The spelling of 2143431312 in words is "two billion, one hundred forty-three million, four hundred thirty-one thousand, three hundred twelve".