51205445204 has 12 divisors (see below), whose sum is σ = 94880678004. Its totient is φ = 24096680064.

The previous prime is 51205445197. The next prime is 51205445219. The reversal of 51205445204 is 40254450215.

It can be written as a sum of positive squares in 2 ways, for example, as 28676035600 + 22529409604 = 169340^2 + 150098^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376510559 + ... + 376510694.

It is an arithmetic number, because the mean of its divisors is an integer number (7906723167).

Almost surely, 2^51205445204 is an apocalyptic number.

It is an amenable number.

51205445204 is a deficient number, since it is larger than the sum of its proper divisors (43675232800).

51205445204 is a wasteful number, since it uses less digits than its factorization.

51205445204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753021274 (or 753021272 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 32.

Adding to 51205445204 its reverse (40254450215), we get a palindrome (91459895419).

The spelling of 51205445204 in words is "fifty-one billion, two hundred five million, four hundred forty-five thousand, two hundred four".