43212420400 has 120 divisors (see below), whose sum is σ = 106970278464. Its totient is φ = 16766668800.

The previous prime is 43212420397. The next prime is 43212420413. The reversal of 43212420400 is 402421234.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2114230 + ... + 2134570.

Almost surely, 2^43212420400 is an apocalyptic number.

43212420400 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 43212420400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53485139232).

43212420400 is an abundant number, since it is smaller than the sum of its proper divisors (63757858064).

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

43212420400 is a wasteful number, since it uses less digits than its factorization.

43212420400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20519 (or 20508 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 43212420400 its reverse (402421234), we get a palindrome (43614841634).

The spelling of 43212420400 in words is "forty-three billion, two hundred twelve million, four hundred twenty thousand, four hundred".