43011021144 has 128 divisors (see below), whose sum is σ = 132493616640. Its totient is φ = 11330537472.

The previous prime is 43011021143. The next prime is 43011021197. The reversal of 43011021144 is 44112011034.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 43011021144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43011021143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1970032 + ... + 1991744.

It is an arithmetic number, because the mean of its divisors is an integer number (1035106380).

Almost surely, 2^43011021144 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 43011021144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66246808320).

43011021144 is an abundant number, since it is smaller than the sum of its proper divisors (89482595496).

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

43011021144 is a wasteful number, since it uses less digits than its factorization.

43011021144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22649 (or 22645 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 43011021144 its reverse (44112011034), we get a palindrome (87123032178).

The spelling of 43011021144 in words is "forty-three billion, eleven million, twenty-one thousand, one hundred forty-four".