205798925 has 12 divisors (see below), whose sum is σ = 263423616. Its totient is φ = 159327600.

The previous prime is 205798891. The next prime is 205798927. The reversal of 205798925 is 529897502.

It is a de Polignac number, because none of the positive numbers 2^k-205798925 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205798925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205798927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131999 + ... + 133548.

It is an arithmetic number, because the mean of its divisors is an integer number (21951968).

Almost surely, 2^205798925 is an apocalyptic number.

205798925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205798925 is a deficient number, since it is larger than the sum of its proper divisors (57624691).

205798925 is a wasteful number, since it uses less digits than its factorization.

205798925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265588 (or 265583 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 47.

The square root of 205798925 is about 14345.6936047024. The cubic root of 205798925 is about 590.4018377161.

The spelling of 205798925 in words is "two hundred five million, seven hundred ninety-eight thousand, nine hundred twenty-five".