43243303421 has 4 divisors (see below), whose sum is σ = 45123447072. Its totient is φ = 41363159772.

The previous prime is 43243303319. The next prime is 43243303459. The reversal of 43243303421 is 12430334234.

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 not a de Polignac number, because 43243303421 - 2¹⁰ = 43243302397 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 (43243300421) 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, 940071791 + ... + 940071836.

It is an arithmetic number, because the mean of its divisors is an integer number (11280861768).

Almost surely, 2^43243303421 is an apocalyptic number.

It is an amenable number.

43243303421 is a deficient number, since it is larger than the sum of its proper divisors (1880143651).

43243303421 is a wasteful number, since it uses less digits than its factorization.

43243303421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880143650.

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 43243303421 its reverse (12430334234), we get a palindrome (55673637655).

The spelling of 43243303421 in words is "forty-three billion, two hundred forty-three million, three hundred three thousand, four hundred twenty-one".