51220055323 has 4 divisors (see below), whose sum is σ = 51229251648. Its totient is φ = 51210859000.

The previous prime is 51220055273. The next prime is 51220055351. The reversal of 51220055323 is 32355002215.

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

It is a cyclic number.

It is not a de Polignac number, because 51220055323 - 2²⁹ = 50683184411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51220055291 and 51220055300.

It is not an unprimeable number, because it can be changed into a prime (51220055023) 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 3 ways as a sum of consecutive naturals, for example, 4589803 + ... + 4600948.

It is an arithmetic number, because the mean of its divisors is an integer number (12807312912).

Almost surely, 2^51220055323 is an apocalyptic number.

51220055323 is a deficient number, since it is larger than the sum of its proper divisors (9196325).

51220055323 is an equidigital number, since it uses as much as digits as its factorization.

51220055323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9196324.

The product of its (nonzero) digits is 9000, while the sum is 28.

Adding to 51220055323 its reverse (32355002215), we get a palindrome (83575057538).

The spelling of 51220055323 in words is "fifty-one billion, two hundred twenty million, fifty-five thousand, three hundred twenty-three".