2217879 has 12 divisors (see below), whose sum is σ = 3219216. Its totient is φ = 1471392.

The previous prime is 2217863. The next prime is 2217881. The reversal of 2217879 is 9787122.

It is not a de Polignac number, because 2217879 - 2⁴ = 2217863 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1899 + ... + 2835.

It is an arithmetic number, because the mean of its divisors is an integer number (268268).

2^2217879 is an apocalyptic number.

2217879 is a deficient number, since it is larger than the sum of its proper divisors (1001337).

2217879 is a wasteful number, since it uses less digits than its factorization.

2217879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206 (or 1203 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 2217879 is about 1489.2545114922. The cubic root of 2217879 is about 130.4105168918.

It can be divided in two parts, 221 and 7879, that added together give a square (8100 = 90²).

The spelling of 2217879 in words is "two million, two hundred seventeen thousand, eight hundred seventy-nine".