2213705 has 8 divisors (see below), whose sum is σ = 2860872. Its totient is φ = 1634688.

The previous prime is 2213699. The next prime is 2213711. The reversal of 2213705 is 5073122.

It is an interprime number because it is at equal distance from previous prime (2213699) and next prime (2213711).

It can be written as a sum of positive squares in 4 ways, for example, as 222784 + 1990921 = 472^2 + 1411^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2213705 - 2¹⁸ = 1951561 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16964 + ... + 17093.

It is an arithmetic number, because the mean of its divisors is an integer number (357609).

2^2213705 is an apocalyptic number.

It is an amenable number.

2213705 is a deficient number, since it is larger than the sum of its proper divisors (647167).

2213705 is a wasteful number, since it uses less digits than its factorization.

2213705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34075.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 2213705 is about 1487.8524792465. The cubic root of 2213705 is about 130.3286555985.

Adding to 2213705 its reverse (5073122), we get a palindrome (7286827).

The spelling of 2213705 in words is "two million, two hundred thirteen thousand, seven hundred five".