525323209 has 2 divisors, whose sum is σ = 525323210. Its totient is φ = 525323208.

The previous prime is 525323189. The next prime is 525323261. The reversal of 525323209 is 902323525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 491065600 + 34257609 = 22160^2 + 5853^2 .

It is a cyclic number.

It is not a de Polignac number, because 525323209 - 2⁵ = 525323177 is a prime.

It is not a weakly prime, because it can be changed into another prime (525323269) 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, 262661604 + 262661605.

It is an arithmetic number, because the mean of its divisors is an integer number (262661605).

Almost surely, 2^525323209 is an apocalyptic number.

It is an amenable number.

525323209 is a deficient number, since it is larger than the sum of its proper divisors (1).

525323209 is an equidigital number, since it uses as much as digits as its factorization.

525323209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 525323209 is about 22919.9303882014. The cubic root of 525323209 is about 806.8798365624.

The spelling of 525323209 in words is "five hundred twenty-five million, three hundred twenty-three thousand, two hundred nine".