51204313213 has 4 divisors (see below), whose sum is σ = 51204780448. Its totient is φ = 51203845980.

The previous prime is 51204313211. The next prime is 51204313219. The reversal of 51204313213 is 31231340215.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 51204313213 - 2¹ = 51204313211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51204313211) 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 3 ways as a sum of consecutive naturals, for example, 29698 + ... + 321388.

It is an arithmetic number, because the mean of its divisors is an integer number (12801195112).

Almost surely, 2^51204313213 is an apocalyptic number.

It is an amenable number.

51204313213 is a deficient number, since it is larger than the sum of its proper divisors (467235).

51204313213 is a wasteful number, since it uses less digits than its factorization.

51204313213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467234.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 51204313213 its reverse (31231340215), we get a palindrome (82435653428).

The spelling of 51204313213 in words is "fifty-one billion, two hundred four million, three hundred thirteen thousand, two hundred thirteen".