4243543320 has 128 divisors (see below), whose sum is σ = 13525963200. Its totient is φ = 1063028736.

The previous prime is 4243543301. The next prime is 4243543361. The reversal of 4243543320 is 233453424.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112282 + ... + 145238.

Almost surely, 2^4243543320 is an apocalyptic number.

4243543320 is a gapful number since it is divisible by the number (40) 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 4243543320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6762981600).

4243543320 is an abundant number, since it is smaller than the sum of its proper divisors (9282419880).

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

4243543320 is a wasteful number, since it uses less digits than its factorization.

4243543320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33037 (or 33033 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 30.

The square root of 4243543320 is about 65142.4847545747. The cubic root of 4243543320 is about 1618.9852050213.

Adding to 4243543320 its reverse (233453424), we get a palindrome (4476996744).

The spelling of 4243543320 in words is "four billion, two hundred forty-three million, five hundred forty-three thousand, three hundred twenty".