51106321081875 has 20 divisors (see below), whose sum is σ = 85149945101672. Its totient is φ = 27256704576000.

The previous prime is 51106321081867. The next prime is 51106321081877. The reversal of 51106321081875 is 57818012360115.

It is a happy number.

It is not a de Polignac number, because 51106321081875 - 2³ = 51106321081867 is a prime.

It is a super-2 number, since 2×51106321081875² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51106321081877) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13628350414 + ... + 13628354163.

Almost surely, 2^{51106321081875} is an apocalyptic number.

51106321081875 is a deficient number, since it is larger than the sum of its proper divisors (34043624019797).

51106321081875 is an equidigital number, since it uses as much as digits as its factorization.

51106321081875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27256704600 (or 27256704585 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 48.

The spelling of 51106321081875 in words is "fifty-one trillion, one hundred six billion, three hundred twenty-one million, eighty-one thousand, eight hundred seventy-five".