43445144521 has 8 divisors (see below), whose sum is σ = 45383848704. Its totient is φ = 41510589120.

The previous prime is 43445144497. The next prime is 43445144537. The reversal of 43445144521 is 12544154434.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43445144521 - 2³³ = 34855209929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43445144551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1015776 + ... + 1057681.

It is an arithmetic number, because the mean of its divisors is an integer number (5672981088).

Almost surely, 2^43445144521 is an apocalyptic number.

It is an amenable number.

43445144521 is a deficient number, since it is larger than the sum of its proper divisors (1938704183).

43445144521 is a wasteful number, since it uses less digits than its factorization.

43445144521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074391.

The product of its digits is 153600, while the sum is 37.

Adding to 43445144521 its reverse (12544154434), we get a palindrome (55989298955).

The spelling of 43445144521 in words is "forty-three billion, four hundred forty-five million, one hundred forty-four thousand, five hundred twenty-one".