51515301311 has 4 divisors (see below), whose sum is σ = 51515865000. Its totient is φ = 51514737624.

The previous prime is 51515301281. The next prime is 51515301367. The reversal of 51515301311 is 11310351515.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 51515301311 - 2²² = 51511107007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51515301011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109721 + ... + 339218.

It is an arithmetic number, because the mean of its divisors is an integer number (12878966250).

Almost surely, 2^51515301311 is an apocalyptic number.

51515301311 is a deficient number, since it is larger than the sum of its proper divisors (563689).

51515301311 is a wasteful number, since it uses less digits than its factorization.

51515301311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563688.

The product of its (nonzero) digits is 1125, while the sum is 26.

Adding to 51515301311 its reverse (11310351515), we get a palindrome (62825652826).

The spelling of 51515301311 in words is "fifty-one billion, five hundred fifteen million, three hundred one thousand, three hundred eleven".