51372320361321 has 8 divisors (see below), whose sum is σ = 68496460284160. Its totient is φ = 34248197006352.

The previous prime is 51372320361251. The next prime is 51372320361331. The reversal of 51372320361321 is 12316302327315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51372320361321 - 2¹¹ = 51372320359273 is a prime.

It is a super-3 number, since 3×51372320361321³ (a number of 42 digits) contains 333 as substring.

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 51372320361321.

It is not an unprimeable number, because it can be changed into a prime (51372320361331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9731016 + ... + 14051238.

It is an arithmetic number, because the mean of its divisors is an integer number (8562057535520).

Almost surely, 2^{51372320361321} is an apocalyptic number.

It is an amenable number.

51372320361321 is a deficient number, since it is larger than the sum of its proper divisors (17124139922839).

51372320361321 is a wasteful number, since it uses less digits than its factorization.

51372320361321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8283935.

The product of its (nonzero) digits is 136080, while the sum is 39.

Adding to 51372320361321 its reverse (12316302327315), we get a palindrome (63688622688636).

The spelling of 51372320361321 in words is "fifty-one trillion, three hundred seventy-two billion, three hundred twenty million, three hundred sixty-one thousand, three hundred twenty-one".