51211644215304 has 32 divisors (see below), whose sum is σ = 128060498160000. Its totient is φ = 17066363055552.

The previous prime is 51211644215297. The next prime is 51211644215357. The reversal of 51211644215304 is 40351244611215.

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, 261463579 + ... + 261659370.

It is an arithmetic number, because the mean of its divisors is an integer number (4001890567500).

Almost surely, 2^{51211644215304} is an apocalyptic number.

It is an amenable number.

51211644215304 is an abundant number, since it is smaller than the sum of its proper divisors (76848853944696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51211644215304 is a wasteful number, since it uses less digits than its factorization.

51211644215304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523127037 (or 523127033 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

Adding to 51211644215304 its reverse (40351244611215), we get a palindrome (91562888826519).

The spelling of 51211644215304 in words is "fifty-one trillion, two hundred eleven billion, six hundred forty-four million, two hundred fifteen thousand, three hundred four".