43431103221 has 32 divisors (see below), whose sum is σ = 65482560000. Its totient is φ = 25363020480.

The previous prime is 43431103213. The next prime is 43431103229. The reversal of 43431103221 is 12230113434.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (43431103213) and next prime (43431103229).

It is not a de Polignac number, because 43431103221 - 2³ = 43431103213 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 43431103191 and 43431103200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43431103229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 432070 + ... + 523016.

It is an arithmetic number, because the mean of its divisors is an integer number (2046330000).

Almost surely, 2^43431103221 is an apocalyptic number.

It is an amenable number.

43431103221 is a deficient number, since it is larger than the sum of its proper divisors (22051456779).

43431103221 is a wasteful number, since it uses less digits than its factorization.

43431103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91489.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 43431103221 its reverse (12230113434), we get a palindrome (55661216655).

The spelling of 43431103221 in words is "forty-three billion, four hundred thirty-one million, one hundred three thousand, two hundred twenty-one".