2143435240 has 32 divisors (see below), whose sum is σ = 4989033000. Its totient is φ = 827809024.

The previous prime is 2143435237. The next prime is 2143435267. The reversal of 2143435240 is 425343412.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1742394564 + 401040676 = 41742^2 + 20026^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2143435199 and 2143435208.

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, 922735 + ... + 925054.

Almost surely, 2^2143435240 is an apocalyptic number.

2143435240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143435240 is an abundant number, since it is smaller than the sum of its proper divisors (2845597760).

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

2143435240 is a wasteful number, since it uses less digits than its factorization.

2143435240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847829 (or 1847825 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 2143435240 is about 46297.2487303511. The cubic root of 2143435240 is about 1289.3479147276.

Adding to 2143435240 its reverse (425343412), we get a palindrome (2568778652).

The spelling of 2143435240 in words is "two billion, one hundred forty-three million, four hundred thirty-five thousand, two hundred forty".