2216256 has 112 divisors (see below), whose sum is σ = 7168896. Its totient is φ = 589824.

The previous prime is 2216237. The next prime is 2216281. The reversal of 2216256 is 6526122.

2216256 = T₁₂₁ + T₁₂₂ + ... + T₂₄₆.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22800 + ... + 22896.

It is an arithmetic number, because the mean of its divisors is an integer number (64008).

2^2216256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2216256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3584448).

2216256 is an abundant number, since it is smaller than the sum of its proper divisors (4952640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2216256 is a wasteful number, since it uses less digits than its factorization.

2216256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 126 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 2216256 is about 1488.7095082655. The cubic root of 2216256 is about 130.3786985165.

The spelling of 2216256 in words is "two million, two hundred sixteen thousand, two hundred fifty-six".