43228239 has 4 divisors (see below), whose sum is σ = 57637656. Its totient is φ = 28818824.

The previous prime is 43228217. The next prime is 43228243. The reversal of 43228239 is 93282234.

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 43228239 - 2¹¹ = 43226191 is a prime.

It is a super-2 number, since 2×43228239² = 3737361294082242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43228039) 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, 7204704 + ... + 7204709.

It is an arithmetic number, because the mean of its divisors is an integer number (14409414).

Almost surely, 2^43228239 is an apocalyptic number.

43228239 is a deficient number, since it is larger than the sum of its proper divisors (14409417).

43228239 is a wasteful number, since it uses less digits than its factorization.

43228239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14409416.

The product of its digits is 20736, while the sum is 33.

The square root of 43228239 is about 6574.8185526294. The cubic root of 43228239 is about 350.9585668741.

It can be divided in two parts, 4322 and 8239, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 43228239 in words is "forty-three million, two hundred twenty-eight thousand, two hundred thirty-nine".