443581442421 has 16 divisors (see below), whose sum is σ = 654151983744. Its totient is φ = 265595540544.

The previous prime is 443581442377. The next prime is 443581442429. The reversal of 443581442421 is 124244185344.

It is a happy number.

It is not a de Polignac number, because 443581442421 - 2¹³ = 443581434229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443581442429) 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, 153699681 + ... + 153702566.

It is an arithmetic number, because the mean of its divisors is an integer number (40884498984).

Almost surely, 2^443581442421 is an apocalyptic number.

It is an amenable number.

443581442421 is a deficient number, since it is larger than the sum of its proper divisors (210570541323).

443581442421 is a wasteful number, since it uses less digits than its factorization.

443581442421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307402300.

The product of its digits is 491520, while the sum is 42.

The spelling of 443581442421 in words is "four hundred forty-three billion, five hundred eighty-one million, four hundred forty-two thousand, four hundred twenty-one".