204213013 has 2 divisors, whose sum is σ = 204213014. Its totient is φ = 204213012.

The previous prime is 204213001. The next prime is 204213017. The reversal of 204213013 is 310312402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188705169 + 15507844 = 13737^2 + 3938^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204213013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204213017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102106506 + 102106507.

It is an arithmetic number, because the mean of its divisors is an integer number (102106507).

Almost surely, 2^204213013 is an apocalyptic number.

It is an amenable number.

204213013 is a deficient number, since it is larger than the sum of its proper divisors (1).

204213013 is an equidigital number, since it uses as much as digits as its factorization.

204213013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 204213013 is about 14290.3118580386. The cubic root of 204213013 is about 588.8813554368.

Adding to 204213013 its reverse (310312402), we get a palindrome (514525415).

The spelling of 204213013 in words is "two hundred four million, two hundred thirteen thousand, thirteen".