43320001 has 4 divisors (see below), whose sum is σ = 43345072. Its totient is φ = 43294932.

The previous prime is 43319993. The next prime is 43320023. The reversal of 43320001 is 10002334.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10002334 = 2 ⋅5001167.

It is a cyclic number.

It is not a de Polignac number, because 43320001 - 2³ = 43319993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43320031) 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, 9735 + ... + 13468.

It is an arithmetic number, because the mean of its divisors is an integer number (10836268).

Almost surely, 2^43320001 is an apocalyptic number.

It is an amenable number.

43320001 is a deficient number, since it is larger than the sum of its proper divisors (25071).

43320001 is a wasteful number, since it uses less digits than its factorization.

43320001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25070.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 43320001 is about 6581.7931447289. The cubic root of 43320001 is about 351.2067217863.

Adding to 43320001 its reverse (10002334), we get a palindrome (53322335).

The spelling of 43320001 in words is "forty-three million, three hundred twenty thousand, one".