205420573 has 2 divisors, whose sum is σ = 205420574. Its totient is φ = 205420572.

The previous prime is 205420549. The next prime is 205420577. The reversal of 205420573 is 375024502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165199609 + 40220964 = 12853^2 + 6342^2 .

It is a cyclic number.

It is not a de Polignac number, because 205420573 - 2⁵ = 205420541 is a prime.

It is a super-2 number, since 2×205420573² = 84395223623296658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205420577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102710286 + 102710287.

It is an arithmetic number, because the mean of its divisors is an integer number (102710287).

Almost surely, 2^205420573 is an apocalyptic number.

It is an amenable number.

205420573 is a deficient number, since it is larger than the sum of its proper divisors (1).

205420573 is an equidigital number, since it uses as much as digits as its factorization.

205420573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 205420573 is about 14332.5005843363. The cubic root of 205420573 is about 590.0398067559.

The spelling of 205420573 in words is "two hundred five million, four hundred twenty thousand, five hundred seventy-three".