43224421521 has 32 divisors (see below), whose sum is σ = 59538866688. Its totient is φ = 27878031360.

The previous prime is 43224421463. The next prime is 43224421531. The reversal of 43224421521 is 12512442234.

It is a happy number.

It is not a de Polignac number, because 43224421521 - 2²² = 43220227217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43224421531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15768211 + ... + 15770951.

It is an arithmetic number, because the mean of its divisors is an integer number (1860589584).

Almost surely, 2^43224421521 is an apocalyptic number.

It is an amenable number.

43224421521 is a deficient number, since it is larger than the sum of its proper divisors (16314445167).

43224421521 is a wasteful number, since it uses less digits than its factorization.

43224421521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4041.

The product of its digits is 15360, while the sum is 30.

Adding to 43224421521 its reverse (12512442234), we get a palindrome (55736863755).

The spelling of 43224421521 in words is "forty-three billion, two hundred twenty-four million, four hundred twenty-one thousand, five hundred twenty-one".