2009550 has 24 divisors (see below), whose sum is σ = 4984056. Its totient is φ = 535840.

The previous prime is 2009543. The next prime is 2009593. The reversal of 2009550 is 559002.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6549 + ... + 6848.

It is an arithmetic number, because the mean of its divisors is an integer number (207669).

2^2009550 is an apocalyptic number.

2009550 is an abundant number, since it is smaller than the sum of its proper divisors (2974506).

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

2009550 is a wasteful number, since it uses less digits than its factorization.

2009550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13412 (or 13407 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 2009550 is about 1417.5859762286. The cubic root of 2009550 is about 126.1923240786.

The spelling of 2009550 in words is "two million, nine thousand, five hundred fifty".