2213857 has 8 divisors (see below), whose sum is σ = 2275200. Its totient is φ = 2153424.

The previous prime is 2213843. The next prime is 2213867. The reversal of 2213857 is 7583122.

2213857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2213857 is a prime.

It is a super-5 number, since 5×2213857⁵ (a number of 33 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2213837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9144 + ... + 9382.

It is an arithmetic number, because the mean of its divisors is an integer number (284400).

2^2213857 is an apocalyptic number.

It is an amenable number.

2213857 is a deficient number, since it is larger than the sum of its proper divisors (61343).

2213857 is a wasteful number, since it uses less digits than its factorization.

2213857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455.

The product of its digits is 3360, while the sum is 28.

The square root of 2213857 is about 1487.9035587026. The cubic root of 2213857 is about 130.3316384564.

Adding to 2213857 its reverse (7583122), we get a palindrome (9796979).

The spelling of 2213857 in words is "two million, two hundred thirteen thousand, eight hundred fifty-seven".