51311611316 has 48 divisors (see below), whose sum is σ = 104476229760. Its totient is φ = 21594798720.

The previous prime is 51311611313. The next prime is 51311611327. The reversal of 51311611316 is 61311611315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51311611313) 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 15 ways as a sum of consecutive naturals, for example, 1032986 + ... + 1081518.

It is an arithmetic number, because the mean of its divisors is an integer number (2176588120).

Almost surely, 2^51311611316 is an apocalyptic number.

It is an amenable number.

51311611316 is an abundant number, since it is smaller than the sum of its proper divisors (53164618444).

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

51311611316 is a wasteful number, since it uses less digits than its factorization.

51311611316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49224 (or 49222 counting only the distinct ones).

The product of its digits is 1620, while the sum is 29.

Subtracting 51311611316 from its reverse (61311611315), we obtain a palindrome (9999999999).

The spelling of 51311611316 in words is "fifty-one billion, three hundred eleven million, six hundred eleven thousand, three hundred sixteen".