2217493 has 2 divisors, whose sum is σ = 2217494. Its totient is φ = 2217492.

The previous prime is 2217491. The next prime is 2217503. The reversal of 2217493 is 3947122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1830609 + 386884 = 1353^2 + 622^2 .

It is a cyclic number.

It is not a de Polignac number, because 2217493 - 2¹ = 2217491 is a prime.

Together with 2217491, it forms a pair of twin primes.

It is equal to p₁₆₃₈₆₄ and since 2217493 and 163864 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2217491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1108746 + 1108747.

It is an arithmetic number, because the mean of its divisors is an integer number (1108747).

2^2217493 is an apocalyptic number.

It is an amenable number.

2217493 is a deficient number, since it is larger than the sum of its proper divisors (1).

2217493 is an equidigital number, since it uses as much as digits as its factorization.

2217493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 2217493 is about 1489.1249108117. The cubic root of 2217493 is about 130.4029508974.

It can be divided in two parts, 2217 and 493, that multiplied together give a triangular number (1092981 = T₁₄₇₈).

The spelling of 2217493 in words is "two million, two hundred seventeen thousand, four hundred ninety-three".