51033520837 has 8 divisors (see below), whose sum is σ = 54961045496. Its totient is φ = 47106263232.

The previous prime is 51033520831. The next prime is 51033520841. The reversal of 51033520837 is 73802533015.

It is a Cunningham number, because it is equal to 225906²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 7549176996 + 43484343841 = 86886^2 + 208529^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51033520837 - 2¹⁵ = 51033488069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51033520796 and 51033520805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51033520831) 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, 523423 + ... + 613219.

It is an arithmetic number, because the mean of its divisors is an integer number (6870130687).

Almost surely, 2^51033520837 is an apocalyptic number.

It is an amenable number.

51033520837 is a deficient number, since it is larger than the sum of its proper divisors (3927524659).

51033520837 is a wasteful number, since it uses less digits than its factorization.

51033520837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133527.

The product of its (nonzero) digits is 75600, while the sum is 37.

The spelling of 51033520837 in words is "fifty-one billion, thirty-three million, five hundred twenty thousand, eight hundred thirty-seven".