525533209 has 2 divisors, whose sum is σ = 525533210. Its totient is φ = 525533208.

The previous prime is 525533207. The next prime is 525533231. The reversal of 525533209 is 902335525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 480267225 + 45265984 = 21915^2 + 6728^2 .

It is a cyclic number.

It is not a de Polignac number, because 525533209 - 2¹ = 525533207 is a prime.

Together with 525533207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (525533207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262766604 + 262766605.

It is an arithmetic number, because the mean of its divisors is an integer number (262766605).

Almost surely, 2^525533209 is an apocalyptic number.

It is an amenable number.

525533209 is a deficient number, since it is larger than the sum of its proper divisors (1).

525533209 is an equidigital number, since it uses as much as digits as its factorization.

525533209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40500, while the sum is 34.

The square root of 525533209 is about 22924.5110962044. The cubic root of 525533209 is about 806.9873400251.

The spelling of 525533209 in words is "five hundred twenty-five million, five hundred thirty-three thousand, two hundred nine".