43220221440 has 160 divisors (see below), whose sum is σ = 150730816896. Its totient is φ = 10477608960.

The previous prime is 43220221411. The next prime is 43220221459. The reversal of 43220221440 is 4412202234.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 43220221440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171322 + ... + 340281.

Almost surely, 2^43220221440 is an apocalyptic number.

43220221440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43220221440 is an abundant number, since it is smaller than the sum of its proper divisors (107510595456).

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

43220221440 is a wasteful number, since it uses less digits than its factorization.

43220221440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511640 (or 511624 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 43220221440 its reverse (4412202234), we get a palindrome (47632423674).

The spelling of 43220221440 in words is "forty-three billion, two hundred twenty million, two hundred twenty-one thousand, four hundred forty".