2543135545 has 4 divisors (see below), whose sum is σ = 3051762660. Its totient is φ = 2034508432.

The previous prime is 2543135527. The next prime is 2543135557. The reversal of 2543135545 is 5455313452.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2002294009 + 540841536 = 44747^2 + 23256^2 .

It is a cyclic number.

It is not a de Polignac number, because 2543135545 - 2⁵ = 2543135513 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254313550 + ... + 254313559.

It is an arithmetic number, because the mean of its divisors is an integer number (762940665).

Almost surely, 2^2543135545 is an apocalyptic number.

It is an amenable number.

2543135545 is a deficient number, since it is larger than the sum of its proper divisors (508627115).

2543135545 is an equidigital number, since it uses as much as digits as its factorization.

2543135545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508627114.

The product of its digits is 180000, while the sum is 37.

The square root of 2543135545 is about 50429.5106559641. The cubic root of 2543135545 is about 1364.9701979745.

Adding to 2543135545 its reverse (5455313452), we get a palindrome (7998448997).

The spelling of 2543135545 in words is "two billion, five hundred forty-three million, one hundred thirty-five thousand, five hundred forty-five".