205220453 has 2 divisors, whose sum is σ = 205220454. Its totient is φ = 205220452.

The previous prime is 205220437. The next prime is 205220551. The reversal of 205220453 is 354022502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198753604 + 6466849 = 14098^2 + 2543^2 .

It is a cyclic number.

It is not a de Polignac number, because 205220453 - 2⁴ = 205220437 is a prime.

It is equal to p_11351930 and since 205220453 and 11351930 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 (205226453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102610226 + 102610227.

It is an arithmetic number, because the mean of its divisors is an integer number (102610227).

Almost surely, 2^205220453 is an apocalyptic number.

It is an amenable number.

205220453 is a deficient number, since it is larger than the sum of its proper divisors (1).

205220453 is an equidigital number, since it uses as much as digits as its factorization.

205220453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 205220453 is about 14325.5175473698. The cubic root of 205220453 is about 589.8481396002.

Adding to 205220453 its reverse (354022502), we get a palindrome (559242955).

The spelling of 205220453 in words is "two hundred five million, two hundred twenty thousand, four hundred fifty-three".