43136221 has 8 divisors (see below), whose sum is σ = 44816384. Its totient is φ = 41474160.

The previous prime is 43136189. The next prime is 43136227. The reversal of 43136221 is 12263134.

43136221 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 43136221 - 2⁵ = 43136189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43136192 and 43136201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43136227) by changing a digit.

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, 436 + ... + 9298.

It is an arithmetic number, because the mean of its divisors is an integer number (5602048).

Almost surely, 2^43136221 is an apocalyptic number.

It is an amenable number.

43136221 is a deficient number, since it is larger than the sum of its proper divisors (1680163).

43136221 is a wasteful number, since it uses less digits than its factorization.

43136221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9051.

The product of its digits is 864, while the sum is 22.

The square root of 43136221 is about 6567.8170650529. The cubic root of 43136221 is about 350.7093667532.

Adding to 43136221 its reverse (12263134), we get a palindrome (55399355).

The spelling of 43136221 in words is "forty-three million, one hundred thirty-six thousand, two hundred twenty-one".