2216825 has 24 divisors (see below), whose sum is σ = 3124800. Its totient is φ = 1546560.

The previous prime is 2216821. The next prime is 2216839. The reversal of 2216825 is 5286122.

It is not a de Polignac number, because 2216825 - 2² = 2216821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2216794 and 2216803.

It is not an unprimeable number, because it can be changed into a prime (2216821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5996 + ... + 6354.

It is an arithmetic number, because the mean of its divisors is an integer number (130200).

2^2216825 is an apocalyptic number.

2216825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2216825 is a deficient number, since it is larger than the sum of its proper divisors (907975).

2216825 is a wasteful number, since it uses less digits than its factorization.

2216825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 396 counting only the distinct ones).

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

The square root of 2216825 is about 1488.9006011148. The cubic root of 2216825 is about 130.3898553401.

The spelling of 2216825 in words is "two million, two hundred sixteen thousand, eight hundred twenty-five".