43234313021 has 4 divisors (see below), whose sum is σ = 45509803200. Its totient is φ = 40958822844.

The previous prime is 43234312993. The next prime is 43234313027. The reversal of 43234313021 is 12031343234.

43234313021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-43234313021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43234313027) 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, 1137745061 + ... + 1137745098.

It is an arithmetic number, because the mean of its divisors is an integer number (11377450800).

Almost surely, 2^43234313021 is an apocalyptic number.

It is an amenable number.

43234313021 is a deficient number, since it is larger than the sum of its proper divisors (2275490179).

43234313021 is a wasteful number, since it uses less digits than its factorization.

43234313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275490178.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 43234313021 its reverse (12031343234), we get a palindrome (55265656255).

The spelling of 43234313021 in words is "forty-three billion, two hundred thirty-four million, three hundred thirteen thousand, twenty-one".