6523816213 has 6 divisors (see below), whose sum is σ = 6538332066. Its totient is φ = 6509332512.

The previous prime is 6523816207. The next prime is 6523816219. The reversal of 6523816213 is 3126183256.

It is an interprime number because it is at equal distance from previous prime (6523816207) and next prime (6523816219).

It can be written as a sum of positive squares in 3 ways, for example, as 4725462564 + 1798353649 = 68742^2 + 42407^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6523816213 is a prime.

It is a super-2 number, since 2×6523816213² = 85120355962003322738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6523816219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 193231 + ... + 224467.

It is an arithmetic number, because the mean of its divisors is an integer number (1089722011).

Almost surely, 2^6523816213 is an apocalyptic number.

It is an amenable number.

6523816213 is a deficient number, since it is larger than the sum of its proper divisors (14515853).

6523816213 is an frugal number, since it uses more digits than its factorization.

6523816213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32151 (or 31694 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 6523816213 is about 80770.1443170680. The cubic root of 6523816213 is about 1868.5321407338.

Adding to 6523816213 its reverse (3126183256), we get a palindrome (9649999469).

The spelling of 6523816213 in words is "six billion, five hundred twenty-three million, eight hundred sixteen thousand, two hundred thirteen".