1545521543 has 4 divisors (see below), whose sum is σ = 1545601680. Its totient is φ = 1545441408.

The previous prime is 1545521531. The next prime is 1545521557. The reversal of 1545521543 is 3451255451.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1545521543 - 2⁶ = 1545521479 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 (1545521743) 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, 8423 + ... + 56231.

It is an arithmetic number, because the mean of its divisors is an integer number (386400420).

Almost surely, 2^1545521543 is an apocalyptic number.

1545521543 is a deficient number, since it is larger than the sum of its proper divisors (80137).

1545521543 is an equidigital number, since it uses as much as digits as its factorization.

1545521543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80136.

The product of its digits is 60000, while the sum is 35.

The square root of 1545521543 is about 39313.1217661483. The cubic root of 1545521543 is about 1156.1788512422.

Adding to 1545521543 its reverse (3451255451), we get a palindrome (4996776994).

The spelling of 1545521543 in words is "one billion, five hundred forty-five million, five hundred twenty-one thousand, five hundred forty-three".