2211830 has 24 divisors (see below), whose sum is σ = 4138992. Its totient is φ = 850976.

The previous prime is 2211821. The next prime is 2211883. The reversal of 2211830 is 381122.

It is a junction number, because it is equal to n+sod(n) for n = 2211799 and 2211808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8279 + ... + 8541.

It is an arithmetic number, because the mean of its divisors is an integer number (172458).

2^2211830 is an apocalyptic number.

2211830 is a deficient number, since it is larger than the sum of its proper divisors (1927162).

2211830 is a wasteful number, since it uses less digits than its factorization.

2211830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2211830 is about 1487.2222429751. Note that the first 4 decimals coincide. The cubic root of 2211830 is about 130.2918492408.

Adding to 2211830 its reverse (381122), we get a palindrome (2592952).

It can be divided in two parts, 2 and 211830, that multiplied together give a triangular number (423660 = T₉₂₀).

The spelling of 2211830 in words is "two million, two hundred eleven thousand, eight hundred thirty".