43220643 has 8 divisors (see below), whose sum is σ = 59614800. Its totient is φ = 27820128.

The previous prime is 43220641. The next prime is 43220651. The reversal of 43220643 is 34602234.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43220643 - 2¹ = 43220641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43220641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248308 + ... + 248481.

It is an arithmetic number, because the mean of its divisors is an integer number (7451850).

Almost surely, 2^43220643 is an apocalyptic number.

43220643 is a deficient number, since it is larger than the sum of its proper divisors (16394157).

43220643 is a wasteful number, since it uses less digits than its factorization.

43220643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496821.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 43220643 is about 6574.2408687239. The cubic root of 43220643 is about 350.9380090359.

Adding to 43220643 its reverse (34602234), we get a palindrome (77822877).

The spelling of 43220643 in words is "forty-three million, two hundred twenty thousand, six hundred forty-three".