51021264263 has 16 divisors (see below), whose sum is σ = 54254759040. Its totient is φ = 47979881728.

The previous prime is 51021264209. The next prime is 51021264271. The reversal of 51021264263 is 36246212015.

It is not a de Polignac number, because 51021264263 - 2¹⁶ = 51021198727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51021264563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7036706 + ... + 7043952.

It is an arithmetic number, because the mean of its divisors is an integer number (3390922440).

Almost surely, 2^51021264263 is an apocalyptic number.

51021264263 is a deficient number, since it is larger than the sum of its proper divisors (3233494777).

51021264263 is an equidigital number, since it uses as much as digits as its factorization.

51021264263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8731 (or 8697 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 51021264263 its reverse (36246212015), we get a palindrome (87267476278).

It can be divided in two parts, 510212 and 64263, that added together give a palindrome (574475).

The spelling of 51021264263 in words is "fifty-one billion, twenty-one million, two hundred sixty-four thousand, two hundred sixty-three".