522778213 has 2 divisors, whose sum is σ = 522778214. Its totient is φ = 522778212.

The previous prime is 522778211. The next prime is 522778343. The reversal of 522778213 is 312877225.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 515199204 + 7579009 = 22698^2 + 2753^2 .

It is a cyclic number.

It is not a de Polignac number, because 522778213 - 2¹ = 522778211 is a prime.

Together with 522778211, 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 (522778211) 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, 261389106 + 261389107.

It is an arithmetic number, because the mean of its divisors is an integer number (261389107).

Almost surely, 2^522778213 is an apocalyptic number.

It is an amenable number.

522778213 is a deficient number, since it is larger than the sum of its proper divisors (1).

522778213 is an equidigital number, since it uses as much as digits as its factorization.

522778213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 37.

The square root of 522778213 is about 22864.3437036798. The cubic root of 522778213 is about 805.5747155540.

The spelling of 522778213 in words is "five hundred twenty-two million, seven hundred seventy-eight thousand, two hundred thirteen".