51215224553 has 2 divisors, whose sum is σ = 51215224554. Its totient is φ = 51215224552.

The previous prime is 51215224549. The next prime is 51215224597. The reversal of 51215224553 is 35542251215.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31701090304 + 19514134249 = 178048^2 + 139693^2 .

It is a cyclic number.

It is not a de Polignac number, because 51215224553 - 2² = 51215224549 is a prime.

It is not a weakly prime, because it can be changed into another prime (51215224513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25607612276 + 25607612277.

It is an arithmetic number, because the mean of its divisors is an integer number (25607612277).

Almost surely, 2^51215224553 is an apocalyptic number.

It is an amenable number.

51215224553 is a deficient number, since it is larger than the sum of its proper divisors (1).

51215224553 is an equidigital number, since it uses as much as digits as its factorization.

51215224553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60000, while the sum is 35.

Adding to 51215224553 its reverse (35542251215), we get a palindrome (86757475768).

The spelling of 51215224553 in words is "fifty-one billion, two hundred fifteen million, two hundred twenty-four thousand, five hundred fifty-three".