51211403052 has 12 divisors (see below), whose sum is σ = 119493273816. Its totient is φ = 17070467680.

The previous prime is 51211403027. The next prime is 51211403069. The reversal of 51211403052 is 25030411215.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2133808449 + ... + 2133808472.

It is an arithmetic number, because the mean of its divisors is an integer number (9957772818).

Almost surely, 2^51211403052 is an apocalyptic number.

It is an amenable number.

51211403052 is an abundant number, since it is smaller than the sum of its proper divisors (68281870764).

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

51211403052 is a wasteful number, since it uses less digits than its factorization.

51211403052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4267616928 (or 4267616926 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 51211403052 its reverse (25030411215), we get a palindrome (76241814267).

The spelling of 51211403052 in words is "fifty-one billion, two hundred eleven million, four hundred three thousand, fifty-two".