2191050 has 60 divisors (see below), whose sum is σ = 6099126. Its totient is φ = 583200.

The previous prime is 2191031. The next prime is 2191051. The reversal of 2191050 is 501912.

2191050 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1520289 + 670761 = 1233^2 + 819^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2191051) by changing a digit.

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 29 ways as a sum of consecutive naturals, for example, 3780 + ... + 4320.

2^2191050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2191050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3049563).

2191050 is an abundant number, since it is smaller than the sum of its proper divisors (3908076).

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

2191050 is a wasteful number, since it uses less digits than its factorization.

2191050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 2191050 is about 1480.2195783059. The cubic root of 2191050 is about 129.8825368948.

Adding to 2191050 its reverse (501912), we get a palindrome (2692962).

The spelling of 2191050 in words is "two million, one hundred ninety-one thousand, fifty".