51222430313 has 2 divisors, whose sum is σ = 51222430314. Its totient is φ = 51222430312.

The previous prime is 51222430309. The next prime is 51222430319. The reversal of 51222430313 is 31303422215.

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., 43202869609 + 8019560704 = 207853^2 + 89552^2 .

It is a cyclic number.

It is not a de Polignac number, because 51222430313 - 2² = 51222430309 is a prime.

It is not a weakly prime, because it can be changed into another prime (51222430319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25611215156 + 25611215157.

It is an arithmetic number, because the mean of its divisors is an integer number (25611215157).

Almost surely, 2^51222430313 is an apocalyptic number.

It is an amenable number.

51222430313 is a deficient number, since it is larger than the sum of its proper divisors (1).

51222430313 is an equidigital number, since it uses as much as digits as its factorization.

51222430313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 51222430313 its reverse (31303422215), we get a palindrome (82525852528).

The spelling of 51222430313 in words is "fifty-one billion, two hundred twenty-two million, four hundred thirty thousand, three hundred thirteen".