2216831 has 8 divisors (see below), whose sum is σ = 2281824. Its totient is φ = 2152800.

The previous prime is 2216821. The next prime is 2216839. The reversal of 2216831 is 1386122.

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-2216831 is a prime.

It is a super-2 number, since 2×2216831² = 9828679365122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2216797 and 2216806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7865 + ... + 8141.

It is an arithmetic number, because the mean of its divisors is an integer number (285228).

2^2216831 is an apocalyptic number.

2216831 is a deficient number, since it is larger than the sum of its proper divisors (64993).

2216831 is a wasteful number, since it uses less digits than its factorization.

2216831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481.

The product of its digits is 576, while the sum is 23.

The square root of 2216831 is about 1488.9026160230. The cubic root of 2216831 is about 130.3899729766.

The spelling of 2216831 in words is "two million, two hundred sixteen thousand, eight hundred thirty-one".