51313216411 has 4 divisors (see below), whose sum is σ = 51317629992. Its totient is φ = 51308802832.

The previous prime is 51313216393. The next prime is 51313216433. The reversal of 51313216411 is 11461231315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51313216411 - 2²³ = 51304827803 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51313216411.

It is not an unprimeable number, because it can be changed into a prime (51313217411) 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 3 ways as a sum of consecutive naturals, for example, 2189305 + ... + 2212618.

It is an arithmetic number, because the mean of its divisors is an integer number (12829407498).

Almost surely, 2^51313216411 is an apocalyptic number.

51313216411 is a deficient number, since it is larger than the sum of its proper divisors (4413581).

51313216411 is a wasteful number, since it uses less digits than its factorization.

51313216411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4413580.

The product of its digits is 2160, while the sum is 28.

Adding to 51313216411 its reverse (11461231315), we get a palindrome (62774447726).

The spelling of 51313216411 in words is "fifty-one billion, three hundred thirteen million, two hundred sixteen thousand, four hundred eleven".