51550500513999 has 4 divisors (see below), whose sum is σ = 68734000685336. Its totient is φ = 34367000342664.

The previous prime is 51550500513893. The next prime is 51550500514081. The reversal of 51550500513999 is 99931500505515.

It is a happy number.

51550500513999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51550500513999 - 2¹⁶ = 51550500448463 is a prime.

It is a super-2 number, since 2×51550500513999² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51550500512999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8591750085664 + ... + 8591750085669.

It is an arithmetic number, because the mean of its divisors is an integer number (17183500171334).

Almost surely, 2^{51550500513999} is an apocalyptic number.

51550500513999 is a deficient number, since it is larger than the sum of its proper divisors (17183500171337).

51550500513999 is a wasteful number, since it uses less digits than its factorization.

51550500513999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17183500171336.

The product of its (nonzero) digits is 6834375, while the sum is 57.

The spelling of 51550500513999 in words is "fifty-one trillion, five hundred fifty billion, five hundred million, five hundred thirteen thousand, nine hundred ninety-nine".