51226213 has 2 divisors, whose sum is σ = 51226214. Its totient is φ = 51226212.

The previous prime is 51226211. The next prime is 51226271. The reversal of 51226213 is 31262215.

51226213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50936769 + 289444 = 7137^2 + 538^2 .

It is a cyclic number.

It is not a de Polignac number, because 51226213 - 2¹ = 51226211 is a prime.

Together with 51226211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51226211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25613106 + 25613107.

It is an arithmetic number, because the mean of its divisors is an integer number (25613107).

Almost surely, 2^51226213 is an apocalyptic number.

It is an amenable number.

51226213 is a deficient number, since it is larger than the sum of its proper divisors (1).

51226213 is an equidigital number, since it uses as much as digits as its factorization.

51226213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 51226213 is about 7157.2489826748. The cubic root of 51226213 is about 371.3904656526.

Adding to 51226213 its reverse (31262215), we get a palindrome (82488428).

The spelling of 51226213 in words is "fifty-one million, two hundred twenty-six thousand, two hundred thirteen".