51045216999 has 16 divisors (see below), whose sum is σ = 78072353280. Its totient is φ = 29060258400.

The previous prime is 51045216997. The next prime is 51045217039. The reversal of 51045216999 is 99961254015.

51045216999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51045216999 - 2¹ = 51045216997 is a prime.

It is a super-2 number, since 2×51045216999² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51045216997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4512427 + ... + 4523724.

It is an arithmetic number, because the mean of its divisors is an integer number (4879522080).

Almost surely, 2^51045216999 is an apocalyptic number.

51045216999 is a deficient number, since it is larger than the sum of its proper divisors (27027136281).

51045216999 is a wasteful number, since it uses less digits than its factorization.

51045216999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9036430.

The product of its (nonzero) digits is 874800, while the sum is 51.

The spelling of 51045216999 in words is "fifty-one billion, forty-five million, two hundred sixteen thousand, nine hundred ninety-nine".