43536221 has 8 divisors (see below), whose sum is σ = 45120000. Its totient is φ = 41958000.

The previous prime is 43536209. The next prime is 43536223. The reversal of 43536221 is 12263534.

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-43536221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43536223) 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, 20780 + ... + 22778.

It is an arithmetic number, because the mean of its divisors is an integer number (5640000).

Almost surely, 2^43536221 is an apocalyptic number.

It is an amenable number.

43536221 is a deficient number, since it is larger than the sum of its proper divisors (1583779).

43536221 is a wasteful number, since it uses less digits than its factorization.

43536221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779.

The product of its digits is 4320, while the sum is 26.

The square root of 43536221 is about 6598.1983146917. The cubic root of 43536221 is about 351.7900699215.

Adding to 43536221 its reverse (12263534), we get a palindrome (55799755).

The spelling of 43536221 in words is "forty-three million, five hundred thirty-six thousand, two hundred twenty-one".