10205550 has 36 divisors (see below), whose sum is σ = 27420120. Its totient is φ = 2721360.

The previous prime is 10205543. The next prime is 10205551. The reversal of 10205550 is 5550201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10205551) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10890 + ... + 11789.

It is an arithmetic number, because the mean of its divisors is an integer number (761670).

Almost surely, 2^10205550 is an apocalyptic number.

10205550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10205550 is an abundant number, since it is smaller than the sum of its proper divisors (17214570).

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

10205550 is a wasteful number, since it uses less digits than its factorization.

10205550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22697 (or 22689 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 10205550 is about 3194.6126525762. The cubic root of 10205550 is about 216.9096157100.

Adding to 10205550 its reverse (5550201), we get a palindrome (15755751).

The spelling of 10205550 in words is "ten million, two hundred five thousand, five hundred fifty".