2217992 has 16 divisors (see below), whose sum is σ = 4752960. Its totient is φ = 950544.

The previous prime is 2217991. The next prime is 2218001. The reversal of 2217992 is 2997122.

It is not an unprimeable number, because it can be changed into a prime (2217991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19748 + ... + 19859.

It is an arithmetic number, because the mean of its divisors is an integer number (297060).

2^2217992 is an apocalyptic number.

It is an amenable number.

2217992 is an abundant number, since it is smaller than the sum of its proper divisors (2534968).

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

2217992 is a wasteful number, since it uses less digits than its factorization.

2217992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39620 (or 39616 counting only the distinct ones).

The product of its digits is 4536, while the sum is 32.

The square root of 2217992 is about 1489.2924494538. The cubic root of 2217992 is about 130.4127316411.

The spelling of 2217992 in words is "two million, two hundred seventeen thousand, nine hundred ninety-two".