43344332421 has 24 divisors (see below), whose sum is σ = 66114449184. Its totient is φ = 25104403200.

The previous prime is 43344332413. The next prime is 43344332431. The reversal of 43344332421 is 12423344334.

It is a happy number.

It is not a de Polignac number, because 43344332421 - 2³ = 43344332413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43344332411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1911555 + ... + 1934096.

It is an arithmetic number, because the mean of its divisors is an integer number (2754768716).

Almost surely, 2^43344332421 is an apocalyptic number.

It is an amenable number.

43344332421 is a deficient number, since it is larger than the sum of its proper divisors (22770116763).

43344332421 is a wasteful number, since it uses less digits than its factorization.

43344332421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3845701 (or 3845684 counting only the distinct ones).

The product of its digits is 82944, while the sum is 33.

Adding to 43344332421 its reverse (12423344334), we get a palindrome (55767676755).

The spelling of 43344332421 in words is "forty-three billion, three hundred forty-four million, three hundred thirty-two thousand, four hundred twenty-one".