43052221 has 4 divisors (see below), whose sum is σ = 43103200. Its totient is φ = 43001244.

The previous prime is 43052203. The next prime is 43052227. The reversal of 43052221 is 12225034.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43052221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43052227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24201 + ... + 25918.

It is an arithmetic number, because the mean of its divisors is an integer number (10775800).

Almost surely, 2^43052221 is an apocalyptic number.

It is an amenable number.

43052221 is a deficient number, since it is larger than the sum of its proper divisors (50979).

43052221 is an equidigital number, since it uses as much as digits as its factorization.

43052221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50978.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 43052221 is about 6561.4191300358. The cubic root of 43052221 is about 350.4815711076.

Adding to 43052221 its reverse (12225034), we get a palindrome (55277255).

The spelling of 43052221 in words is "forty-three million, fifty-two thousand, two hundred twenty-one".