205146013 has 2 divisors, whose sum is σ = 205146014. Its totient is φ = 205146012.

The previous prime is 205145999. The next prime is 205146043. The reversal of 205146013 is 310641502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144648729 + 60497284 = 12027^2 + 7778^2 .

It is a cyclic number.

It is not a de Polignac number, because 205146013 - 2²¹ = 203048861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205146043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102573006 + 102573007.

It is an arithmetic number, because the mean of its divisors is an integer number (102573007).

Almost surely, 2^205146013 is an apocalyptic number.

It is an amenable number.

205146013 is a deficient number, since it is larger than the sum of its proper divisors (1).

205146013 is an equidigital number, since it uses as much as digits as its factorization.

205146013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 205146013 is about 14322.9191507877. The cubic root of 205146013 is about 589.7768120678.

Adding to 205146013 its reverse (310641502), we get a palindrome (515787515).

The spelling of 205146013 in words is "two hundred five million, one hundred forty-six thousand, thirteen".