2217973 has 4 divisors (see below), whose sum is σ = 2348460. Its totient is φ = 2087488.

The previous prime is 2217967. The next prime is 2217991. The reversal of 2217973 is 3797122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1483524 + 734449 = 1218^2 + 857^2 .

It is a cyclic number.

It is not a de Polignac number, because 2217973 - 2¹⁷ = 2086901 is a prime.

It is a super-3 number, since 3×2217973³ = 32733317266220238951, which contains 333 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 2⁵ + 2²¹ + 1 + 7⁴ + 9 + 7⁶ + 3⁶ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2217073) 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, 65218 + ... + 65251.

It is an arithmetic number, because the mean of its divisors is an integer number (587115).

2^2217973 is an apocalyptic number.

It is an amenable number.

2217973 is a deficient number, since it is larger than the sum of its proper divisors (130487).

2217973 is a wasteful number, since it uses less digits than its factorization.

2217973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130486.

The product of its digits is 5292, while the sum is 31.

The square root of 2217973 is about 1489.2860705721. The cubic root of 2217973 is about 130.4123592549.

The spelling of 2217973 in words is "two million, two hundred seventeen thousand, nine hundred seventy-three".