2217473 has 2 divisors, whose sum is σ = 2217474.
Its totient is φ = 2217472.
The previous prime is 2217443. The next prime is 2217491. The reversal of 2217473 is 3747122.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 1993744 + 223729 = 1412^2 + 473^2
It is a cyclic number.
It is not a de Polignac number, because 2217473 - 26 = 2217409 is a prime.
It is equal to p163862 and since 2217473 and 163862 have the same sum of digits, it is a Honaker prime.
It is not a weakly prime, because it can be changed into another prime (2217443) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1108736 + 1108737.
It is an arithmetic number, because the mean of its divisors is an integer number (1108737).
22217473 is an apocalyptic number.
It is an amenable number.
2217473 is a deficient number, since it is larger than the sum of its proper divisors (1).
2217473 is an equidigital number, since it uses as much as digits as its factorization.
2217473 is an evil number, because the sum of its binary digits is even.
The product of its digits is 2352, while the sum is 26.
The square root of 2217473 is about 1489.1181954432.
The cubic root of 2217473 is about 130.4025588530.
The spelling of 2217473 in words is "two million, two hundred seventeen thousand, four hundred seventy-three".