2165550 has 24 divisors (see below), whose sum is σ = 5370936. Its totient is φ = 577440.

The previous prime is 2165543. The next prime is 2165551. The reversal of 2165550 is 555612.

It is a self number, because there is not a number n which added to its sum of digits gives 2165550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7069 + ... + 7368.

It is an arithmetic number, because the mean of its divisors is an integer number (223789).

2^2165550 is an apocalyptic number.

2165550 is an abundant number, since it is smaller than the sum of its proper divisors (3205386).

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

2165550 is a wasteful number, since it uses less digits than its factorization.

2165550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14452 (or 14447 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 2165550 is about 1471.5807826959. The cubic root of 2165550 is about 129.3767007175.

The spelling of 2165550 in words is "two million, one hundred sixty-five thousand, five hundred fifty".