13205550 has 24 divisors (see below), whose sum is σ = 32750136. Its totient is φ = 3521440.

The previous prime is 13205537. The next prime is 13205603. The reversal of 13205550 is 5550231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43869 + ... + 44168.

It is an arithmetic number, because the mean of its divisors is an integer number (1364589).

Almost surely, 2^13205550 is an apocalyptic number.

13205550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13205550 is an abundant number, since it is smaller than the sum of its proper divisors (19544586).

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

13205550 is a wasteful number, since it uses less digits than its factorization.

13205550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88052 (or 88047 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 13205550 is about 3633.9441382608. The cubic root of 13205550 is about 236.3662679015.

Adding to 13205550 its reverse (5550231), we get a palindrome (18755781).

The spelling of 13205550 in words is "thirteen million, two hundred five thousand, five hundred fifty".