2100225 has 24 divisors (see below), whose sum is σ = 3562272. Its totient is φ = 1091200.

The previous prime is 2100221. The next prime is 2100227. The reversal of 2100225 is 5220012.

2100225 is nontrivially palindromic in base 2.

2100225 is a nontrivial binomial coefficient, being equal to C(2050, 2).

It is not a de Polignac number, because 2100225 - 2² = 2100221 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2100225.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2734 + ... + 3416.

It is an arithmetic number, because the mean of its divisors is an integer number (148428).

2^2100225 is an apocalyptic number.

2100225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2100225 is the 2049-th triangular number and also the 1025-th hexagonal number.

It is an amenable number.

2100225 is a deficient number, since it is larger than the sum of its proper divisors (1462047).

2100225 is a wasteful number, since it uses less digits than its factorization.

2100225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 2100225 is about 1449.2153049150. The cubic root of 2100225 is about 128.0624898324.

Adding to 2100225 its reverse (5220012), we get a palindrome (7320237).

The spelling of 2100225 in words is "two million, one hundred thousand, two hundred twenty-five".