522505213 has 2 divisors, whose sum is σ = 522505214. Its totient is φ = 522505212.

The previous prime is 522505201. The next prime is 522505253. The reversal of 522505213 is 312505225.

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., 519019524 + 3485689 = 22782^2 + 1867^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-522505213 is a prime.

It is a super-2 number, since 2×522505213² = 546023395224350738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (522505253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261252606 + 261252607.

It is an arithmetic number, because the mean of its divisors is an integer number (261252607).

Almost surely, 2^522505213 is an apocalyptic number.

It is an amenable number.

522505213 is a deficient number, since it is larger than the sum of its proper divisors (1).

522505213 is an equidigital number, since it uses as much as digits as its factorization.

522505213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 522505213 is about 22858.3729298478. The cubic root of 522505213 is about 805.4344647524.

The spelling of 522505213 in words is "five hundred twenty-two million, five hundred five thousand, two hundred thirteen".