43421313 has 16 divisors (see below), whose sum is σ = 64035776. Its totient is φ = 25997760.

The previous prime is 43421291. The next prime is 43421317. The reversal of 43421313 is 31312434.

It is not a de Polignac number, because 43421313 - 2⁶ = 43421249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43421313.

It is not an unprimeable number, because it can be changed into a prime (43421317) 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 15 ways as a sum of consecutive naturals, for example, 13603 + ... + 16488.

It is an arithmetic number, because the mean of its divisors is an integer number (4002236).

Almost surely, 2^43421313 is an apocalyptic number.

It is an amenable number.

43421313 is a deficient number, since it is larger than the sum of its proper divisors (20614463).

43421313 is a wasteful number, since it uses less digits than its factorization.

43421313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30144.

The product of its digits is 864, while the sum is 21.

The square root of 43421313 is about 6589.4850329901. The cubic root of 43421313 is about 351.4802963675.

Adding to 43421313 its reverse (31312434), we get a palindrome (74733747).

It can be divided in two parts, 43421 and 313, that added together give a palindrome (43734).

The spelling of 43421313 in words is "forty-three million, four hundred twenty-one thousand, three hundred thirteen".