43213331 has 8 divisors (see below), whose sum is σ = 49714944. Its totient is φ = 36793800.

The previous prime is 43213319. The next prime is 43213367. The reversal of 43213331 is 13331234.

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

It is a cyclic number.

It is not a de Polignac number, because 43213331 - 2¹⁰ = 43212307 is a prime.

It is a super-2 number, since 2×43213331² = 3734783952231122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43213301) 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 7 ways as a sum of consecutive naturals, for example, 19385 + ... + 21498.

It is an arithmetic number, because the mean of its divisors is an integer number (6214368).

Almost surely, 2^43213331 is an apocalyptic number.

43213331 is a deficient number, since it is larger than the sum of its proper divisors (6501613).

43213331 is a wasteful number, since it uses less digits than its factorization.

43213331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41041.

The product of its digits is 648, while the sum is 20.

The square root of 43213331 is about 6573.6847353672. The cubic root of 43213331 is about 350.9182175407.

Adding to 43213331 its reverse (13331234), we get a palindrome (56544565).

The spelling of 43213331 in words is "forty-three million, two hundred thirteen thousand, three hundred thirty-one".