2321217 has 10 divisors (see below), whose sum is σ = 3467618. Its totient is φ = 1547424.

The previous prime is 2321213. The next prime is 2321219. The reversal of 2321217 is 7121232.

It can be written as a sum of positive squares in only one way, i.e., 1679616 + 641601 = 1296^2 + 801^2 .

It is not a de Polignac number, because 2321217 - 2² = 2321213 is a prime.

It is a super-2 number, since 2×2321217² = 10776096722178, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2321217.

It is not an unprimeable number, because it can be changed into a prime (2321213) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 14248 + ... + 14409.

2^2321217 is an apocalyptic number.

2321217 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2321217 is a deficient number, since it is larger than the sum of its proper divisors (1146401).

2321217 is an equidigital number, since it uses as much as digits as its factorization.

2321217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28669 (or 28660 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 2321217 is about 1523.5540686172. The cubic root of 2321217 is about 132.4052627646.

Adding to 2321217 its reverse (7121232), we get a palindrome (9442449).

The spelling of 2321217 in words is "two million, three hundred twenty-one thousand, two hundred seventeen".