43520023 has 8 divisors (see below), whose sum is σ = 44407376. Its totient is φ = 42638400.

The previous prime is 43519997. The next prime is 43520041. The reversal of 43520023 is 32002534.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43520023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43520083) 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, 16003 + ... + 18523.

It is an arithmetic number, because the mean of its divisors is an integer number (5550922).

Almost surely, 2^43520023 is an apocalyptic number.

43520023 is a deficient number, since it is larger than the sum of its proper divisors (887353).

43520023 is a wasteful number, since it uses less digits than its factorization.

43520023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2865.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 43520023 is about 6596.9707442128. The cubic root of 43520023 is about 351.7464357378.

Adding to 43520023 its reverse (32002534), we get a palindrome (75522557).

The spelling of 43520023 in words is "forty-three million, five hundred twenty thousand, twenty-three".