43228913 has 24 divisors (see below), whose sum is σ = 54839232. Its totient is φ = 33182784.

The previous prime is 43228901. The next prime is 43228949. The reversal of 43228913 is 31982234.

It is a happy number.

It is not a de Polignac number, because 43228913 - 2⁸ = 43228657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43228913.

It is not an unprimeable number, because it can be changed into a prime (43228993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124406 + ... + 124752.

It is an arithmetic number, because the mean of its divisors is an integer number (2284968).

Almost surely, 2^43228913 is an apocalyptic number.

It is an amenable number.

43228913 is a deficient number, since it is larger than the sum of its proper divisors (11610319).

43228913 is a wasteful number, since it uses less digits than its factorization.

43228913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441 (or 404 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 43228913 is about 6574.8698085970. The cubic root of 43228913 is about 350.9603908735.

The spelling of 43228913 in words is "forty-three million, two hundred twenty-eight thousand, nine hundred thirteen".