51223065563 has 2 divisors, whose sum is σ = 51223065564. Its totient is φ = 51223065562.

The previous prime is 51223065533. The next prime is 51223065581. The reversal of 51223065563 is 36556032215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51223065563 - 2¹⁸ = 51222803419 is a prime.

It is not a weakly prime, because it can be changed into another prime (51223065503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25611532781 + 25611532782.

It is an arithmetic number, because the mean of its divisors is an integer number (25611532782).

Almost surely, 2^51223065563 is an apocalyptic number.

51223065563 is a deficient number, since it is larger than the sum of its proper divisors (1).

51223065563 is an equidigital number, since it uses as much as digits as its factorization.

51223065563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 38.

Adding to 51223065563 its reverse (36556032215), we get a palindrome (87779097778).

The spelling of 51223065563 in words is "fifty-one billion, two hundred twenty-three million, sixty-five thousand, five hundred sixty-three".