2257217 has 4 divisors (see below), whose sum is σ = 2299860. Its totient is φ = 2214576.

The previous prime is 2257207. The next prime is 2257237. The reversal of 2257217 is 7127522.

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 913936 + 1343281 = 956^2 + 1159^2 .

It is a cyclic number.

It is not a de Polignac number, because 2257217 - 2¹⁸ = 1995073 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2257207) 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, 21242 + ... + 21347.

It is an arithmetic number, because the mean of its divisors is an integer number (574965).

2^2257217 is an apocalyptic number.

It is an amenable number.

2257217 is a deficient number, since it is larger than the sum of its proper divisors (42643).

2257217 is an equidigital number, since it uses as much as digits as its factorization.

2257217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42642.

The product of its digits is 1960, while the sum is 26.

The square root of 2257217 is about 1502.4037406769. The cubic root of 2257217 is about 131.1770230745.

The spelling of 2257217 in words is "two million, two hundred fifty-seven thousand, two hundred seventeen".