51555013223 has 16 divisors (see below), whose sum is σ = 60134260800. Its totient is φ = 44181341568.

The previous prime is 51555013217. The next prime is 51555013243. The reversal of 51555013223 is 32231055515.

It is not a de Polignac number, because 51555013223 - 2¹⁰ = 51555012199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51555013223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51555013243) 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, 2236211 + ... + 2259147.

It is an arithmetic number, because the mean of its divisors is an integer number (3758391300).

Almost surely, 2^51555013223 is an apocalyptic number.

51555013223 is a deficient number, since it is larger than the sum of its proper divisors (8579247577).

51555013223 is an equidigital number, since it uses as much as digits as its factorization.

51555013223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29511 (or 29497 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 32.

Adding to 51555013223 its reverse (32231055515), we get a palindrome (83786068738).

The spelling of 51555013223 in words is "fifty-one billion, five hundred fifty-five million, thirteen thousand, two hundred twenty-three".