43781485523 has 4 divisors (see below), whose sum is σ = 43802445720. Its totient is φ = 43760525328.

The previous prime is 43781485499. The next prime is 43781485577. The reversal of 43781485523 is 32558418734.

43781485523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43781485523 - 2¹² = 43781481427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43781482523) 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, 10476965 + ... + 10481142.

It is an arithmetic number, because the mean of its divisors is an integer number (10950611430).

Almost surely, 2^43781485523 is an apocalyptic number.

43781485523 is a deficient number, since it is larger than the sum of its proper divisors (20960197).

43781485523 is a wasteful number, since it uses less digits than its factorization.

43781485523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20960196.

The product of its digits is 3225600, while the sum is 50.

The spelling of 43781485523 in words is "forty-three billion, seven hundred eighty-one million, four hundred eighty-five thousand, five hundred twenty-three".