43255221 has 4 divisors (see below), whose sum is σ = 57673632. Its totient is φ = 28836812.

The previous prime is 43255217. The next prime is 43255273. The reversal of 43255221 is 12255234.

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 not a de Polignac number, because 43255221 - 2² = 43255217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43255191 and 43255200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43256221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7209201 + ... + 7209206.

It is an arithmetic number, because the mean of its divisors is an integer number (14418408).

Almost surely, 2^43255221 is an apocalyptic number.

It is an amenable number.

43255221 is a deficient number, since it is larger than the sum of its proper divisors (14418411).

43255221 is a wasteful number, since it uses less digits than its factorization.

43255221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14418410.

The product of its digits is 2400, while the sum is 24.

The square root of 43255221 is about 6576.8701522837. The cubic root of 43255221 is about 351.0315715792.

The spelling of 43255221 in words is "forty-three million, two hundred fifty-five thousand, two hundred twenty-one".