43520204145 has 16 divisors (see below), whose sum is σ = 75962538432. Its totient is φ = 21100704960.

The previous prime is 43520204087. The next prime is 43520204173. The reversal of 43520204145 is 54140202534.

It is not a de Polignac number, because 43520204145 - 2⁸ = 43520203889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131879242 + ... + 131879571.

It is an arithmetic number, because the mean of its divisors is an integer number (4747658652).

Almost surely, 2^43520204145 is an apocalyptic number.

It is an amenable number.

43520204145 is a deficient number, since it is larger than the sum of its proper divisors (32442334287).

43520204145 is a wasteful number, since it uses less digits than its factorization.

43520204145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263758832.

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 43520204145 its reverse (54140202534), we get a palindrome (97660406679).

The spelling of 43520204145 in words is "forty-three billion, five hundred twenty million, two hundred four thousand, one hundred forty-five".