205252501 has 2 divisors, whose sum is σ = 205252502. Its totient is φ = 205252500.

The previous prime is 205252499. The next prime is 205252513. The reversal of 205252501 is 105252502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205234276 + 18225 = 14326^2 + 135^2 .

It is a cyclic number.

It is not a de Polignac number, because 205252501 - 2¹ = 205252499 is a prime.

Together with 205252499, 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 (205252591) 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, 102626250 + 102626251.

It is an arithmetic number, because the mean of its divisors is an integer number (102626251).

Almost surely, 2^205252501 is an apocalyptic number.

It is an amenable number.

205252501 is a deficient number, since it is larger than the sum of its proper divisors (1).

205252501 is an equidigital number, since it uses as much as digits as its factorization.

205252501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 205252501 is about 14326.6360671303. The cubic root of 205252501 is about 589.8788423055.

Subtracting from 205252501 its reverse (105252502), we obtain a palindrome (99999999).

The spelling of 205252501 in words is "two hundred five million, two hundred fifty-two thousand, five hundred one".