4431330331345 has 4 divisors (see below), whose sum is σ = 5317596397620. Its totient is φ = 3545064265072.

The previous prime is 4431330331339. The next prime is 4431330331349. The reversal of 4431330331345 is 5431330331344.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3057350166784 + 1373980164561 = 1748528^2 + 1172169^2 .

It is a cyclic number.

It is not a de Polignac number, because 4431330331345 - 2⁷ = 4431330331217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4431330331349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443133033130 + ... + 443133033139.

It is an arithmetic number, because the mean of its divisors is an integer number (1329399099405).

Almost surely, 2^{4431330331345} is an apocalyptic number.

It is an amenable number.

4431330331345 is a deficient number, since it is larger than the sum of its proper divisors (886266066275).

4431330331345 is an equidigital number, since it uses as much as digits as its factorization.

4431330331345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886266066274.

The product of its (nonzero) digits is 233280, while the sum is 37.

Adding to 4431330331345 its reverse (5431330331344), we get a palindrome (9862660662689).

Subtracting 4431330331345 from its reverse (5431330331344), we obtain a palindrome (999999999999).

The spelling of 4431330331345 in words is "four trillion, four hundred thirty-one billion, three hundred thirty million, three hundred thirty-one thousand, three hundred forty-five".