205016425 has 12 divisors (see below), whose sum is σ = 258389836. Its totient is φ = 161323200.

The previous prime is 205016419. The next prime is 205016429. The reversal of 205016425 is 524610502.

It can be written as a sum of positive squares in 6 ways, for example, as 23386896 + 181629529 = 4836^2 + 13477^2 .

It is not a de Polignac number, because 205016425 - 2⁵ = 205016393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205016425.

It is not an unprimeable number, because it can be changed into a prime (205016429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65694 + ... + 68743.

Almost surely, 2^205016425 is an apocalyptic number.

205016425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205016425 is a deficient number, since it is larger than the sum of its proper divisors (53373411).

205016425 is a wasteful number, since it uses less digits than its factorization.

205016425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134508 (or 134503 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 205016425 is about 14318.3946376680. The cubic root of 205016425 is about 589.6526011949.

Adding to 205016425 its reverse (524610502), we get a palindrome (729626927).

The spelling of 205016425 in words is "two hundred five million, sixteen thousand, four hundred twenty-five".