6343516121 has 4 divisors (see below), whose sum is σ = 6353413044. Its totient is φ = 6333619200.

The previous prime is 6343516117. The next prime is 6343516169. The reversal of 6343516121 is 1216153436.

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 5746398025 + 597118096 = 75805^2 + 24436^2 .

It is a cyclic number.

It is not a de Polignac number, because 6343516121 - 2² = 6343516117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6343516181) 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, 4947500 + ... + 4948781.

It is an arithmetic number, because the mean of its divisors is an integer number (1588353261).

Almost surely, 2^6343516121 is an apocalyptic number.

It is an amenable number.

6343516121 is a deficient number, since it is larger than the sum of its proper divisors (9896923).

6343516121 is an equidigital number, since it uses as much as digits as its factorization.

6343516121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9896922.

The product of its digits is 12960, while the sum is 32.

The square root of 6343516121 is about 79646.1933867526. The cubic root of 6343516121 is about 1851.1574078120.

Adding to 6343516121 its reverse (1216153436), we get a palindrome (7559669557).

The spelling of 6343516121 in words is "six billion, three hundred forty-three million, five hundred sixteen thousand, one hundred twenty-one".