205220550 has 48 divisors (see below), whose sum is σ = 509824512. Its totient is φ = 54631200.

The previous prime is 205220453. The next prime is 205220551. The reversal of 205220550 is 55022502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205220551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153987 + ... + 155313.

It is an arithmetic number, because the mean of its divisors is an integer number (10621344).

Almost surely, 2^205220550 is an apocalyptic number.

205220550 is an abundant number, since it is smaller than the sum of its proper divisors (304603962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205220550 is a wasteful number, since it uses less digits than its factorization.

205220550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373 (or 2368 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 205220550 is about 14325.5209329364. The cubic root of 205220550 is about 589.8482325332.

The spelling of 205220550 in words is "two hundred five million, two hundred twenty thousand, five hundred fifty".