2191550 has 24 divisors (see below), whose sum is σ = 4158216. Its totient is φ = 859040.

The previous prime is 2191549. The next prime is 2191561. The reversal of 2191550 is 551912.

2191550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2237 + ... + 3063.

It is an arithmetic number, because the mean of its divisors is an integer number (173259).

2^2191550 is an apocalyptic number.

2191550 is a deficient number, since it is larger than the sum of its proper divisors (1966666).

2191550 is a wasteful number, since it uses less digits than its factorization.

2191550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892 (or 887 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 2191550 is about 1480.3884625327. The cubic root of 2191550 is about 129.8924159222.

The spelling of 2191550 in words is "two million, one hundred ninety-one thousand, five hundred fifty".