43213324420 has 144 divisors (see below), whose sum is σ = 111952154160. Its totient is φ = 13922205696.

The previous prime is 43213324411. The next prime is 43213324421. The reversal of 43213324420 is 2442331234.

It can be written as a sum of positive squares in 8 ways, for example, as 5447620864 + 37765703556 = 73808^2 + 194334^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (43213324421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12809854 + ... + 12813226.

It is an arithmetic number, because the mean of its divisors is an integer number (777445515).

Almost surely, 2^43213324420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43213324420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55976077080).

43213324420 is an abundant number, since it is smaller than the sum of its proper divisors (68738829740).

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

43213324420 is a wasteful number, since it uses less digits than its factorization.

43213324420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4182 (or 4173 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 43213324420 its reverse (2442331234), we get a palindrome (45655655654).

The spelling of 43213324420 in words is "forty-three billion, two hundred thirteen million, three hundred twenty-four thousand, four hundred twenty".