443121213 has 8 divisors (see below), whose sum is σ = 606796768. Its totient is φ = 287429904.

The previous prime is 443121209. The next prime is 443121221. The reversal of 443121213 is 312121344.

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

It is not a de Polignac number, because 443121213 - 2² = 443121209 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 443121213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443120213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1995931 + ... + 1996152.

It is an arithmetic number, because the mean of its divisors is an integer number (75849596).

Almost surely, 2^443121213 is an apocalyptic number.

It is an amenable number.

443121213 is a deficient number, since it is larger than the sum of its proper divisors (163675555).

443121213 is a wasteful number, since it uses less digits than its factorization.

443121213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3992123.

The product of its digits is 576, while the sum is 21.

The square root of 443121213 is about 21050.4444846184. Note that the first 4 decimals coincide. The cubic root of 443121213 is about 762.3847145600.

Adding to 443121213 its reverse (312121344), we get a palindrome (755242557).

The spelling of 443121213 in words is "four hundred forty-three million, one hundred twenty-one thousand, two hundred thirteen".