205104054425 has 6 divisors (see below), whose sum is σ = 254329027518. Its totient is φ = 164083243520.

The previous prime is 205104054403. The next prime is 205104054439. The reversal of 205104054425 is 524450401502.

It can be written as a sum of positive squares in 3 ways, for example, as 20606315401 + 184497739024 = 143549^2 + 429532^2 .

It is not a de Polignac number, because 205104054425 - 2⁶ = 205104054361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 205104054391 and 205104054400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4102081064 + ... + 4102081113.

It is an arithmetic number, because the mean of its divisors is an integer number (42388171253).

Almost surely, 2^205104054425 is an apocalyptic number.

205104054425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205104054425 is a deficient number, since it is larger than the sum of its proper divisors (49224973093).

205104054425 is an equidigital number, since it uses as much as digits as its factorization.

205104054425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8204162187 (or 8204162182 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 32.

Adding to 205104054425 its reverse (524450401502), we get a palindrome (729554455927).

The spelling of 205104054425 in words is "two hundred five billion, one hundred four million, fifty-four thousand, four hundred twenty-five".