205503825 has 12 divisors (see below), whose sum is σ = 339766448. Its totient is φ = 109602000.

The previous prime is 205503811. The next prime is 205503839. The reversal of 205503825 is 528305502.

It is an interprime number because it is at equal distance from previous prime (205503811) and next prime (205503839).

It is not a de Polignac number, because 205503825 - 2¹⁷ = 205372753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205503792 and 205503801.

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 11 ways as a sum of consecutive naturals, for example, 1369951 + ... + 1370100.

Almost surely, 2^205503825 is an apocalyptic number.

205503825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205503825 is a deficient number, since it is larger than the sum of its proper divisors (134262623).

205503825 is a wasteful number, since it uses less digits than its factorization.

205503825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740064 (or 2740059 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 205503825 is about 14335.4045984060. The cubic root of 205503825 is about 590.1195056209.

The spelling of 205503825 in words is "two hundred five million, five hundred three thousand, eight hundred twenty-five".