144531520513 has 4 divisors (see below), whose sum is σ = 147258530388. Its totient is φ = 141804510640.

The previous prime is 144531520387. The next prime is 144531520537. The reversal of 144531520513 is 315025135441.

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 132021769104 + 12509751409 = 363348^2 + 111847^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144531520513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144531520583) 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, 1363504858 + ... + 1363504963.

It is an arithmetic number, because the mean of its divisors is an integer number (36814632597).

Almost surely, 2^144531520513 is an apocalyptic number.

It is an amenable number.

144531520513 is a deficient number, since it is larger than the sum of its proper divisors (2727009875).

144531520513 is an equidigital number, since it uses as much as digits as its factorization.

144531520513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727009874.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 144531520513 its reverse (315025135441), we get a palindrome (459556655954).

The spelling of 144531520513 in words is "one hundred forty-four billion, five hundred thirty-one million, five hundred twenty thousand, five hundred thirteen".