43120221 has 8 divisors (see below), whose sum is σ = 57535584. Its totient is φ = 28725840.

The previous prime is 43120219. The next prime is 43120237. The reversal of 43120221 is 12202134.

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

It is not a de Polignac number, because 43120221 - 2¹ = 43120219 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 43120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43120201) 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, 430 + ... + 9296.

It is an arithmetic number, because the mean of its divisors is an integer number (7191948).

Almost surely, 2^43120221 is an apocalyptic number.

It is an amenable number.

43120221 is a deficient number, since it is larger than the sum of its proper divisors (14415363).

43120221 is a wasteful number, since it uses less digits than its factorization.

43120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10491.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 43120221 is about 6566.5988913592. The cubic root of 43120221 is about 350.6659999208.

Adding to 43120221 its reverse (12202134), we get a palindrome (55322355).

The spelling of 43120221 in words is "forty-three million, one hundred twenty thousand, two hundred twenty-one".