51335512201 has 6 divisors (see below), whose sum is σ = 51961471130.
Its totient is φ = 50717005248.
The previous prime is 51335512199. The next prime is 51335512223. The reversal of 51335512201 is 10221553315.
It can be written as a sum of positive squares in only one way, i.e., 39186182025 + 12149330176 = 197955^2 + 110224^2
It is not a de Polignac number, because 51335512201 - 21 = 51335512199 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 51335512201.
It is not an unprimeable number, because it can be changed into a prime (51335512231) 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 5 ways as a sum of consecutive naturals, for example, 3719016 + ... + 3732793.
Almost surely, 251335512201 is an apocalyptic number.
It is an amenable number.
51335512201 is a deficient number, since it is larger than the sum of its proper divisors (625958929).
51335512201 is an frugal number, since it uses more digits than its factorization.
51335512201 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 7451975 (or 7451892 counting only the distinct ones).
The product of its (nonzero) digits is 4500, while the sum is 28.
The spelling of 51335512201 in words is "fifty-one billion, three hundred thirty-five million, five hundred twelve thousand, two hundred one".