2105550 has 36 divisors (see below), whose sum is σ = 5658120. Its totient is φ = 561360.

The previous prime is 2105549. The next prime is 2105557. The reversal of 2105550 is 555012.

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

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1890 + ... + 2789.

It is an arithmetic number, because the mean of its divisors is an integer number (157170).

2^2105550 is an apocalyptic number.

2105550 is an abundant number, since it is smaller than the sum of its proper divisors (3552570).

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

2105550 is a wasteful number, since it uses less digits than its factorization.

2105550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4697 (or 4689 counting only the distinct ones).

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

The square root of 2105550 is about 1451.0513429924. The cubic root of 2105550 is about 128.1706301880.

The spelling of 2105550 in words is "two million, one hundred five thousand, five hundred fifty".