204553117 has 2 divisors, whose sum is σ = 204553118. Its totient is φ = 204553116.

The previous prime is 204553103. The next prime is 204553133. The reversal of 204553117 is 711355402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194351481 + 10201636 = 13941^2 + 3194^2 .

It is a cyclic number.

It is not a de Polignac number, because 204553117 - 2¹¹ = 204551069 is a prime.

It is equal to p_11317069 and since 204553117 and 11317069 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204553147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102276558 + 102276559.

It is an arithmetic number, because the mean of its divisors is an integer number (102276559).

Almost surely, 2^204553117 is an apocalyptic number.

It is an amenable number.

204553117 is a deficient number, since it is larger than the sum of its proper divisors (1).

204553117 is an equidigital number, since it uses as much as digits as its factorization.

204553117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 204553117 is about 14302.2067178460. The cubic root of 204553117 is about 589.2080891403.

The spelling of 204553117 in words is "two hundred four million, five hundred fifty-three thousand, one hundred seventeen".