2143212240 has 160 divisors (see below), whose sum is σ = 7219537920. Its totient is φ = 522805248.

The previous prime is 2143212233. The next prime is 2143212241. The reversal of 2143212240 is 422123412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143212241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 349521 + ... + 355599.

It is an arithmetic number, because the mean of its divisors is an integer number (45122112).

Almost surely, 2^2143212240 is an apocalyptic number.

2143212240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2143212240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3609768960).

2143212240 is an abundant number, since it is smaller than the sum of its proper divisors (5076325680).

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

2143212240 is a wasteful number, since it uses less digits than its factorization.

2143212240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6221 (or 6215 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2143212240 is about 46294.8403172535. The cubic root of 2143212240 is about 1289.3031991931.

Adding to 2143212240 its reverse (422123412), we get a palindrome (2565335652).

The spelling of 2143212240 in words is "two billion, one hundred forty-three million, two hundred twelve thousand, two hundred forty".