43215311440 has 80 divisors (see below), whose sum is σ = 115517106432. Its totient is φ = 14727923712.

The previous prime is 43215311429. The next prime is 43215311441. The reversal of 43215311440 is 4411351234.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a junction number, because it is equal to n+sod(n) for n = 43215311399 and 43215311408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43215311441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137529 + ... + 324568.

Almost surely, 2^43215311440 is an apocalyptic number.

43215311440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43215311440 is an abundant number, since it is smaller than the sum of its proper divisors (72301794992).

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

43215311440 is a wasteful number, since it uses less digits than its factorization.

43215311440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462284 (or 462278 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 43215311440 its reverse (4411351234), we get a palindrome (47626662674).

The spelling of 43215311440 in words is "forty-three billion, two hundred fifteen million, three hundred eleven thousand, four hundred forty".