43228231 has 4 divisors (see below), whose sum is σ = 44043912. Its totient is φ = 42412552.

The previous prime is 43228217. The next prime is 43228243. The reversal of 43228231 is 13282234.

43228231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43228231 - 2⁷ = 43228103 is a prime.

It is a super-2 number, since 2×43228231² = 3737359910778722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43228196 and 43228205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43228261) 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 3 ways as a sum of consecutive naturals, for example, 407761 + ... + 407866.

It is an arithmetic number, because the mean of its divisors is an integer number (11010978).

Almost surely, 2^43228231 is an apocalyptic number.

43228231 is a deficient number, since it is larger than the sum of its proper divisors (815681).

43228231 is an equidigital number, since it uses as much as digits as its factorization.

43228231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815680.

The product of its digits is 2304, while the sum is 25.

The square root of 43228231 is about 6574.8179442476. The cubic root of 43228231 is about 350.9585452242.

The spelling of 43228231 in words is "forty-three million, two hundred twenty-eight thousand, two hundred thirty-one".