43421000000 has 196 divisors, whose sum is σ = 123109049184. Its totient is φ = 14884800000.

The previous prime is 43420999997. The next prime is 43421000011. The reversal of 43421000000 is 12434.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 6996899 + ... + 7003101.

Almost surely, 2^43421000000 is an apocalyptic number.

43421000000 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 43421000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61554524592).

43421000000 is an abundant number, since it is smaller than the sum of its proper divisors (79688049184).

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

43421000000 is an frugal number, since it uses more digits than its factorization.

43421000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6252 (or 6217 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 43421000000 its reverse (12434), we get a palindrome (43421012434).

The spelling of 43421000000 in words is "forty-three billion, four hundred twenty-one million", and thus it is an aban number.