43213645 has 8 divisors (see below), whose sum is σ = 52007904. Its totient is φ = 34469904.

The previous prime is 43213637. The next prime is 43213693. The reversal of 43213645 is 54631234.

43213645 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 not a de Polignac number, because 43213645 - 2³ = 43213637 is a prime.

It is a super-3 number, since 3×43213645³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 10719 + ... + 14188.

It is an arithmetic number, because the mean of its divisors is an integer number (6500988).

Almost surely, 2^43213645 is an apocalyptic number.

It is an amenable number.

43213645 is a deficient number, since it is larger than the sum of its proper divisors (8794259).

43213645 is a wasteful number, since it uses less digits than its factorization.

43213645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25259.

The product of its digits is 8640, while the sum is 28.

The square root of 43213645 is about 6573.7086184284. The cubic root of 43213645 is about 350.9190674949.

Adding to 43213645 its reverse (54631234), we get a palindrome (97844879).

The spelling of 43213645 in words is "forty-three million, two hundred thirteen thousand, six hundred forty-five".