2851216 has 40 divisors (see below), whose sum is σ = 5937120. Its totient is φ = 1322496.

The previous prime is 2851187. The next prime is 2851231. The reversal of 2851216 is 6121582.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25176 + ... + 25288.

It is an arithmetic number, because the mean of its divisors is an integer number (148428).

2^2851216 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 2851216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2968560).

2851216 is an abundant number, since it is smaller than the sum of its proper divisors (3085904).

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

2851216 is a wasteful number, since it uses less digits than its factorization.

2851216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223 (or 217 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 2851216 is about 1688.5544113235. The cubic root of 2851216 is about 141.8001553004.

Adding to 2851216 its reverse (6121582), we get a palindrome (8972798).

The spelling of 2851216 in words is "two million, eight hundred fifty-one thousand, two hundred sixteen".