43312921 has 8 divisors (see below), whose sum is σ = 46252800. Its totient is φ = 40469520.

The previous prime is 43312909. The next prime is 43312931. The reversal of 43312921 is 12921334.

43312921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43312921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43312931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23191 + ... + 24988.

It is an arithmetic number, because the mean of its divisors is an integer number (5781600).

Almost surely, 2^43312921 is an apocalyptic number.

It is an amenable number.

43312921 is a deficient number, since it is larger than the sum of its proper divisors (2939879).

43312921 is a wasteful number, since it uses less digits than its factorization.

43312921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48239.

The product of its digits is 1296, while the sum is 25.

The square root of 43312921 is about 6581.2552754015. The cubic root of 43312921 is about 351.1875875988.

The spelling of 43312921 in words is "forty-three million, three hundred twelve thousand, nine hundred twenty-one".