2212865 has 4 divisors (see below), whose sum is σ = 2655444. Its totient is φ = 1770288.

The previous prime is 2212831. The next prime is 2212871. The reversal of 2212865 is 5682122.

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 652864 + 1560001 = 808^2 + 1249^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212865 - 2¹⁶ = 2147329 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221282 + ... + 221291.

It is an arithmetic number, because the mean of its divisors is an integer number (663861).

2^2212865 is an apocalyptic number.

It is an amenable number.

2212865 is a deficient number, since it is larger than the sum of its proper divisors (442579).

2212865 is an equidigital number, since it uses as much as digits as its factorization.

2212865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442578.

The product of its digits is 1920, while the sum is 26.

The square root of 2212865 is about 1487.5701664123. The cubic root of 2212865 is about 130.3121689211.

Adding to 2212865 its reverse (5682122), we get a palindrome (7894987).

The spelling of 2212865 in words is "two million, two hundred twelve thousand, eight hundred sixty-five".