43144441021 has 16 divisors (see below), whose sum is σ = 47965867200. Its totient is φ = 38473227520.

The previous prime is 43144440979. The next prime is 43144441031. The reversal of 43144441021 is 12014444134.

It is a cyclic number.

It is not a de Polignac number, because 43144441021 - 2¹⁵ = 43144408253 is a prime.

It is a super-2 number, since 2×43144441021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43144441031) 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, 4871205 + ... + 4880053.

It is an arithmetic number, because the mean of its divisors is an integer number (2997866700).

Almost surely, 2^43144441021 is an apocalyptic number.

It is an amenable number.

43144441021 is a deficient number, since it is larger than the sum of its proper divisors (4821426179).

43144441021 is a wasteful number, since it uses less digits than its factorization.

43144441021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17276.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 43144441021 its reverse (12014444134), we get a palindrome (55158885155).

The spelling of 43144441021 in words is "forty-three billion, one hundred forty-four million, four hundred forty-one thousand, twenty-one".