2217830 has 16 divisors (see below), whose sum is σ = 4024944. Its totient is φ = 879840.

The previous prime is 2217829. The next prime is 2217857. The reversal of 2217830 is 387122.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2217796 and 2217805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 464 + ... + 2156.

It is an arithmetic number, because the mean of its divisors is an integer number (251559).

2^2217830 is an apocalyptic number.

2217830 is a deficient number, since it is larger than the sum of its proper divisors (1807114).

2217830 is a wasteful number, since it uses less digits than its factorization.

2217830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2217830 is about 1489.2380602174. The cubic root of 2217830 is about 130.4095564903.

The spelling of 2217830 in words is "two million, two hundred seventeen thousand, eight hundred thirty".