2217993 has 4 divisors (see below), whose sum is σ = 2957328. Its totient is φ = 1478660.

The previous prime is 2217991. The next prime is 2218001. The reversal of 2217993 is 3997122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2217993 - 2¹ = 2217991 is a prime.

It is an Ulam number.

It is a D-number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369663 + ... + 369668.

It is an arithmetic number, because the mean of its divisors is an integer number (739332).

2^2217993 is an apocalyptic number.

It is an amenable number.

2217993 is a deficient number, since it is larger than the sum of its proper divisors (739335).

2217993 is an equidigital number, since it uses as much as digits as its factorization.

2217993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739334.

The product of its digits is 6804, while the sum is 33.

The square root of 2217993 is about 1489.2927851836. The cubic root of 2217993 is about 130.4127512403.

The spelling of 2217993 in words is "two million, two hundred seventeen thousand, nine hundred ninety-three".