2143132440 has 32 divisors (see below), whose sum is σ = 6429397680. Its totient is φ = 571501952.

The previous prime is 2143132423. The next prime is 2143132457. The reversal of 2143132440 is 442313412.

It is an interprime number because it is at equal distance from previous prime (2143132423) and next prime (2143132457).

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

It is a self number, because there is not a number n which added to its sum of digits gives 2143132440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8929599 + ... + 8929838.

Almost surely, 2^2143132440 is an apocalyptic number.

2143132440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143132440 is an abundant number, since it is smaller than the sum of its proper divisors (4286265240).

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

2143132440 is a wasteful number, since it uses less digits than its factorization.

2143132440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17859451 (or 17859447 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 2143132440 is about 46293.9784421257. The cubic root of 2143132440 is about 1289.2871970959.

Adding to 2143132440 its reverse (442313412), we get a palindrome (2585445852).

The spelling of 2143132440 in words is "two billion, one hundred forty-three million, one hundred thirty-two thousand, four hundred forty".