51315316213204 has 24 divisors (see below), whose sum is σ = 90217221080840. Its totient is φ = 25539025147776.

The previous prime is 51315316213157. The next prime is 51315316213219. The reversal of 51315316213204 is 40231261351315.

It can be written as a sum of positive squares in 4 ways, for example, as 18919890090000 + 32395426123204 = 4349700^2 + 5691698^2 .

It is a super-2 number, since 2×51315316213204² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3673467 + ... + 10776130.

Almost surely, 2^{51315316213204} is an apocalyptic number.

It is an amenable number.

51315316213204 is a deficient number, since it is larger than the sum of its proper divisors (38901904867636).

51315316213204 is a wasteful number, since it uses less digits than its factorization.

51315316213204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14453707 (or 14453705 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

Adding to 51315316213204 its reverse (40231261351315), we get a palindrome (91546577564519).

The spelling of 51315316213204 in words is "fifty-one trillion, three hundred fifteen billion, three hundred sixteen million, two hundred thirteen thousand, two hundred four".