43321042431 has 16 divisors (see below), whose sum is σ = 65744673120. Its totient is φ = 28176287040.

The previous prime is 43321042381. The next prime is 43321042447. The reversal of 43321042431 is 13424012334.

It is not a de Polignac number, because 43321042431 - 2⁹ = 43321041919 is a prime.

It is a super-2 number, since 2×43321042431² (a number of 22 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 43321042395 and 43321042404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43321042481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19565760 + ... + 19567973.

It is an arithmetic number, because the mean of its divisors is an integer number (4109042070).

Almost surely, 2^43321042431 is an apocalyptic number.

43321042431 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

43321042431 is a deficient number, since it is larger than the sum of its proper divisors (22423630689).

43321042431 is a wasteful number, since it uses less digits than its factorization.

43321042431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39133783 (or 39133777 counting only the distinct ones).

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

Adding to 43321042431 its reverse (13424012334), we get a palindrome (56745054765).

The spelling of 43321042431 in words is "forty-three billion, three hundred twenty-one million, forty-two thousand, four hundred thirty-one".