43421431323 has 16 divisors (see below), whose sum is σ = 60742556672. Its totient is φ = 27554580000.

The previous prime is 43421431301. The next prime is 43421431343. The reversal of 43421431323 is 32313412434.

It is a happy number.

43421431323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43421431323 - 2¹² = 43421427227 is a prime.

It is a super-3 number, since 3×43421431323³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (43421431343) 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, 3821353 + ... + 3832698.

It is an arithmetic number, because the mean of its divisors is an integer number (3796409792).

Almost surely, 2^43421431323 is an apocalyptic number.

43421431323 is a deficient number, since it is larger than the sum of its proper divisors (17321125349).

43421431323 is a wasteful number, since it uses less digits than its factorization.

43421431323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7654146.

The product of its digits is 20736, while the sum is 30.

Adding to 43421431323 its reverse (32313412434), we get a palindrome (75734843757).

It can be divided in two parts, 4342 and 1431323, that added together give a triangular number (1435665 = T₁₆₉₄).

The spelling of 43421431323 in words is "forty-three billion, four hundred twenty-one million, four hundred thirty-one thousand, three hundred twenty-three".