51343243313 has 8 divisors (see below), whose sum is σ = 51560992488. Its totient is φ = 51125727744.

The previous prime is 51343243291. The next prime is 51343243327. The reversal of 51343243313 is 31334234315.

It can be written as a sum of positive squares in 4 ways, for example, as 2124933409 + 49218309904 = 46097^2 + 221852^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51343243313 - 2⁶ = 51343243249 is a prime.

It is a super-2 number, since 2×51343243313² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51343243313.

It is not an unprimeable number, because it can be changed into a prime (51343243513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389345 + ... + 504257.

It is an arithmetic number, because the mean of its divisors is an integer number (6445124061).

Almost surely, 2^51343243313 is an apocalyptic number.

It is an amenable number.

51343243313 is a deficient number, since it is larger than the sum of its proper divisors (217749175).

51343243313 is a wasteful number, since it uses less digits than its factorization.

51343243313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116803.

The product of its digits is 38880, while the sum is 32.

Adding to 51343243313 its reverse (31334234315), we get a palindrome (82677477628).

The spelling of 51343243313 in words is "fifty-one billion, three hundred forty-three million, two hundred forty-three thousand, three hundred thirteen".