443431220013 has 16 divisors (see below), whose sum is σ = 656963395200. Its totient is φ = 295608098880.

The previous prime is 443431219999. The next prime is 443431220017. The reversal of 443431220013 is 310022134344.

443431220013 is a `hidden beast` number, since 4 + 4 + 3 + 431 + 220 + 0 + 1 + 3 = 666.

It is not a de Polignac number, because 443431220013 - 2⁵ = 443431219981 is a prime.

It is a super-2 number, since 2×443431220013² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443431220017) 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, 308773 + ... + 991061.

It is an arithmetic number, because the mean of its divisors is an integer number (41060212200).

Almost surely, 2^443431220013 is an apocalyptic number.

It is an amenable number.

443431220013 is a deficient number, since it is larger than the sum of its proper divisors (213532175187).

443431220013 is a wasteful number, since it uses less digits than its factorization.

443431220013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706369 (or 706363 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 443431220013 its reverse (310022134344), we get a palindrome (753453354357).

The spelling of 443431220013 in words is "four hundred forty-three billion, four hundred thirty-one million, two hundred twenty thousand, thirteen".