6520344131 has 8 divisors (see below), whose sum is σ = 7467782400. Its totient is φ = 5576896008.

The previous prime is 6520344119. The next prime is 6520344157. The reversal of 6520344131 is 1314430256.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6520344131 is a prime.

It is a super-2 number, since 2×6520344131² = 85029775173332290322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6520344094 and 6520344103.

It is not an unprimeable number, because it can be changed into a prime (6520344191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 994031 + ... + 1000568.

It is an arithmetic number, because the mean of its divisors is an integer number (933472800).

Almost surely, 2^6520344131 is an apocalyptic number.

6520344131 is a deficient number, since it is larger than the sum of its proper divisors (947438269).

6520344131 is a wasteful number, since it uses less digits than its factorization.

6520344131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995073.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 6520344131 is about 80748.6478586484. The cubic root of 6520344131 is about 1868.2005940902.

Adding to 6520344131 its reverse (1314430256), we get a palindrome (7834774387).

The spelling of 6520344131 in words is "six billion, five hundred twenty million, three hundred forty-four thousand, one hundred thirty-one".