43442131300000 has 72 divisors (see below), whose sum is σ = 106901528106492. Its totient is φ = 17376852480000.

The previous prime is 43442131299991. The next prime is 43442131300003. The reversal of 43442131300000 is 313124434.

It can be written as a sum of positive squares in 6 ways, for example, as 5323707123856 + 38118424176144 = 2307316^2 + 6174012^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (43442131300003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217110657 + ... + 217310656.

Almost surely, 2^{43442131300000} is an apocalyptic number.

43442131300000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43442131300000 is an abundant number, since it is smaller than the sum of its proper divisors (63459396806492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43442131300000 is an frugal number, since it uses more digits than its factorization.

43442131300000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434421348 (or 434421320 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 43442131300000 its reverse (313124434), we get a palindrome (43442444424434).

The spelling of 43442131300000 in words is "forty-three trillion, four hundred forty-two billion, one hundred thirty-one million, three hundred thousand".