43344421 has 4 divisors (see below), whose sum is σ = 44401644. Its totient is φ = 42287200.

The previous prime is 43344419. The next prime is 43344439. The reversal of 43344421 is 12444334.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12152196 + 31192225 = 3486^2 + 5585^2 .

It is a cyclic number.

It is not a de Polignac number, because 43344421 - 2¹ = 43344419 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 (43344401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528550 + ... + 528631.

It is an arithmetic number, because the mean of its divisors is an integer number (11100411).

Almost surely, 2^43344421 is an apocalyptic number.

43344421 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

43344421 is a deficient number, since it is larger than the sum of its proper divisors (1057223).

43344421 is a wasteful number, since it uses less digits than its factorization.

43344421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057222.

The product of its digits is 4608, while the sum is 25.

The square root of 43344421 is about 6583.6480009186. The cubic root of 43344421 is about 351.2727025257.

Adding to 43344421 its reverse (12444334), we get a palindrome (55788755).

The spelling of 43344421 in words is "forty-three million, three hundred forty-four thousand, four hundred twenty-one".