204213133 has 2 divisors, whose sum is σ = 204213134. Its totient is φ = 204213132.

The previous prime is 204213131. The next prime is 204213137. The reversal of 204213133 is 331312402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174160809 + 30052324 = 13197^2 + 5482^2 .

It is a cyclic number.

It is not a de Polignac number, because 204213133 - 2¹ = 204213131 is a prime.

Together with 204213131, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 204213133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204213131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102106566 + 102106567.

It is an arithmetic number, because the mean of its divisors is an integer number (102106567).

Almost surely, 2^204213133 is an apocalyptic number.

It is an amenable number.

204213133 is a deficient number, since it is larger than the sum of its proper divisors (1).

204213133 is an equidigital number, since it uses as much as digits as its factorization.

204213133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 204213133 is about 14290.3160566868. The cubic root of 204213133 is about 588.8814707832.

Adding to 204213133 its reverse (331312402), we get a palindrome (535525535).

The spelling of 204213133 in words is "two hundred four million, two hundred thirteen thousand, one hundred thirty-three".