43135333421 has 4 divisors (see below), whose sum is σ = 43228498752. Its totient is φ = 43042168092.

The previous prime is 43135333349. The next prime is 43135333447. The reversal of 43135333421 is 12433353134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43135333421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43135333621) 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, 46581971 + ... + 46582896.

It is an arithmetic number, because the mean of its divisors is an integer number (10807124688).

Almost surely, 2^43135333421 is an apocalyptic number.

It is an amenable number.

43135333421 is a deficient number, since it is larger than the sum of its proper divisors (93165331).

43135333421 is an equidigital number, since it uses as much as digits as its factorization.

43135333421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93165330.

The product of its digits is 38880, while the sum is 32.

Adding to 43135333421 its reverse (12433353134), we get a palindrome (55568686555).

The spelling of 43135333421 in words is "forty-three billion, one hundred thirty-five million, three hundred thirty-three thousand, four hundred twenty-one".