51226813289 has 2 divisors, whose sum is σ = 51226813290. Its totient is φ = 51226813288.

The previous prime is 51226813247. The next prime is 51226813321. The reversal of 51226813289 is 98231862215.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45457651264 + 5769162025 = 213208^2 + 75955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51226813289 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51226813789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25613406644 + 25613406645.

It is an arithmetic number, because the mean of its divisors is an integer number (25613406645).

Almost surely, 2^51226813289 is an apocalyptic number.

It is an amenable number.

51226813289 is a deficient number, since it is larger than the sum of its proper divisors (1).

51226813289 is an equidigital number, since it uses as much as digits as its factorization.

51226813289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 47.

The spelling of 51226813289 in words is "fifty-one billion, two hundred twenty-six million, eight hundred thirteen thousand, two hundred eighty-nine".